# Hon Tre Island, Vietnam 33 Year Paired Monthly Sr/Ca and d18O Data #---------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #---------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/17035 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-coral-17035.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Corals and Sclerosponges # # Dataset_DOI: 10.25921/y3w2-et87 # # Science_Keywords: #-------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/hon-tre2014-bb-noaa.txt # Data_Download_Description: NOAA Template File; Hòn Tre Island Sample BB Monthly Sr/Ca and d18O Data # #-------------------- # Contribution_Date # Date: 2014-08-14 #-------------------- # File_Last_Modified_Date # Date: 2025-08-14 #-------------------- # Title # Study_Name: Hon Tre Island, Vietnam 33 Year Paired Monthly Sr/Ca and d18O Data #-------------------- # Investigators # Investigators: Bolton, A.(https://orcid.org/0000-0002-7252-2049); Goodkin, N.F.(https://orcid.org/0000-0001-9697-5520); Hughen, K.A.(https://orcid.org/0000-0003-3201-934X); Ostermann, D.R.; Vo, S.T.; Phan, H.K. #-------------------- # Description_Notes_and_Keywords # Description: Paired strontium-to-calcium (Sr/Ca) and d18O measurements at monthly resolution for two Porites lutea corals (BB and TN) recovered from Hon Tre Island, Vietnam. The coral Sr/Ca data were determined by inductively coupled plasma optical emission spectroscopy and oxygen isotopes were determined using isotope ratio mass spectrometry ionisation mass spectrometry. Blank sections in the beginning of TN represent no samples present (i.e. this was where the BB coral was younger than the TN coral). Other blanks in both BB and TN represent areas of growth that were not drillable (i.e. sections between coral slabs or areas where coralite growth was not optimal, see manuscript). #-------------------- # Publication # Authors: A. Bolton, N.F. Goodkin, K. Hughen, D.R. Ostermann, S.T. Vo, H.K. Phan # Journal_Name: Palaeogeography, Palaeoclimatology, Palaeoecology # Published_Title: Paired Porites coral Sr/Ca and d18O from the western South China Sea: Proxy calibration of sea surface temperature and precipitation # Published_Date_or_Year: 2014 # Volume: 410 # Issue: # Pages: 233-243 # Report_Number: # DOI: 10.1016/j.palaeo.2014.05.047 # Full_Citation: # Abstract: Paired strontium-to-calcium (Sr/Ca) and d18O measurements for two Porites lutea corals recovered from Hon Tre Island, Vietnam, are strongly correlated to sea surface temperature (SST) and precipitation at monthly to interannual time-scales. Least squares linear regression of monthly Sr/Ca to SST shows a strong, significant correlation (r2 = 0.77, p < .0001), with root mean square residuals of 0.9 °C. 3-year averaged (binned) Sr/Ca for wet (Sep-Nov) and dry (Jan-Mar) seasons separately captures SST variability at interannual time scales (Sr/Ca RMSR = 0.42 °C and 0.70 °C for wet and dry seasons, respectively). Coral d18O correlates weakly to SST at seasonal and interannual time scales for wet and dry seasons, with significant anomalies (d18O RMSR = 2.4 °C and 1.65 °C, respectively). Correcting the SST influence on coral d18O using paired Sr/Ca values provides estimates of d18O of seawater (d18Osw). 3-year averaged d18Osw during the wet season shows a significant correlation to local precipitation (r2 = 0.54, p = 0.01). These results show that coral Sr/Ca in this location accurately reflects SST at a number of timescales, and that seawater d18O composition in the wet season is controlled by local precipitation, largely unmodified by ocean circulation during the winter monsoon. This study highlights the sensitivity and utility of coral geochemistry in this region for reliably reconstructing SST and monsoonal precipitation. #-------------------- # Funding_Agency # Funding_Agency_Name: Woods Hole Oceanographic Institution # Grant: 27500040 #-------------------- # Funding_Agency # Funding_Agency_Name: National Research Foundation Singapore # Grant: NRFF-2012-03 #-------------------- # Funding_Agency # Funding_Agency_Name: Research Grants Council of Hong Kong # Grant: GRF-HKU702509P #-------------------- # Site_Information # Site_Name: Hòn Tre Island # Location: Vietnam # Northernmost_Latitude: 12.213861 # Southernmost_Latitude: 12.213861 # Easternmost_Longitude: 109.304864 # Westernmost_Longitude: 109.304864 # Elevation_m: -8 #-------------------- # Data_Collection # Collection_Name: HonTre2014 BB # First_Year: 1977 # Last_Year: 2010 # Time_Unit: CE # Core_Length_m: # Parameter_Keywords: chemistry, oxygen isotopes # Notes: Water depth 2.5 m #-------------------- # Chronology_Information # Chronology: # #-------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by '##' in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## year_mon notes,,,,,corals and sclerosponges,,,C,year and month ## age_CE age,,,year Common Era,,corals and sclerosponges,,,N, ## depth_mm depth,,,millimeter,,corals and sclerosponges,,,N, ## Sr/Ca-por strontium/calcium,Porites lutea,,millimole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma atomic emission spectroscopy,N, ## d18Opor delta 18O,Porites lutea,,per mil VPDB,,corals and sclerosponges,interpolated,isotope ratio mass spectrometry,N, #-------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: year_mon age_CE depth_mm Sr/Ca-por d18Opor 2010-Nov 2010.875 0.3 9.064 -6.447 2010-Oct 2010.792 0.6 9.002 -6.430 2010-Sep 2010.708 0.9 8.978 -6.059 2010-Aug 2010.625 1.2 8.971 -5.981 2010-Jul 2010.542 1.4 8.974 -6.099 2010-Jun 2010.458 1.7 8.969 -5.990 2010-May 2010.375 2.0 8.966 -5.826 2010-Apr 2010.292 2.5 9.030 -5.537 2010-Mar 2010.208 2.8 9.123 -5.473 2010-Feb 2010.125 3.0 9.203 -5.415 2010-Jan 2010.042 3.3 9.210 -5.278 2009-Dec 2009.958 3.5 9.218 -5.140 2009-Nov 2009.875 4.8 9.148 -5.600 2009-Oct 2009.792 5.8 8.992 -6.070 2009-Sep 2009.708 6.7 8.923 -5.972 2009-Aug 2009.625 7.1 8.932 -5.684 2009-Jul 2009.542 7.6 8.953 -5.581 2009-Jun 2009.458 8.0 8.957 -5.648 2009-May 2009.375 8.4 9.013 -5.066 2009-Apr 2009.292 8.8 9.005 -4.679 2009-Mar 2009.208 9.3 9.080 -4.595 2009-Feb 2009.125 10.1 9.141 -3.944 2009-Jan 2009.042 11.0 9.307 -4.600 2008-Dec 2008.958 11.4 9.210 -5.439 2008-Nov 2008.875 11.8 9.080 -5.910 2008-Oct 2008.792 12.2 8.988 -5.954 2008-Sep 2008.708 12.5 8.945 -5.585 2008-Aug 2008.625 13.0 9.131 -4.782 2008-Jul 2008.542 13.5 9.182 -4.895 2008-Jun 2008.458 13.9 9.125 -4.767 2008-May 2008.375 14.4 9.036 -4.859 2008-Apr 2008.292 14.9 9.077 -4.981 2008-Mar 2008.208 15.4 9.219 -4.234 2008-Feb 2008.125 16.0 9.286 -4.370 2008-Jan 2008.042 16.2 9.257 -4.568 2007-Dec 2007.958 16.5 9.225 -4.764 2007-Nov 2007.875 16.8 9.137 -5.063 2007-Oct 2007.792 17.4 8.999 -5.696 2007-Sep 2007.708 18.3 9.022 -5.316 2007-Aug 2007.625 19.1 9.069 -4.047 2007-Jul 2007.542 20.0 9.032 -4.827 2007-Jun 2007.458 20.9 9.027 -4.896 2007-May 2007.375 21.5 9.056 -5.349 2007-Apr 2007.292 22.1 9.102 -3.937 2007-Mar 2007.208 22.8 9.187 -4.778 2007-Feb 2007.125 23.5 9.263 -4.998 2007-Jan 2007.042 23.9 9.177 -5.483 2006-Dec 2006.958 24.2 9.135 -5.714 2006-Nov 2006.875 24.6 9.088 -5.769 2006-Oct 2006.792 25.6 8.992 -5.929 2006-Sep 2006.708 26.6 8.978 -6.342 2006-Aug 2006.625 27.5 9.011 -5.207 2006-Jul 2006.542 28.5 8.986 -5.097 2006-Jun 2006.458 29.5 8.939 -5.267 2006-May 2006.375 29.7 9.007 -5.078 2006-Apr 2006.292 30.0 9.076 -4.885 2006-Mar 2006.208 30.3 9.194 -4.631 2006-Feb 2006.125 30.7 9.281 -4.713 2006-Jan 2006.042 31.1 9.310 -5.204 2005-Dec 2005.958 31.7 9.266 -5.307 2005-Nov 2005.875 32.4 9.164 -5.783 2005-Oct 2005.792 32.6 9.063 -6.078 2005-Sep 2005.708 32.9 9.004 -6.343 2005-Aug 2005.625 33.2 8.970 -6.408 2005-Jul 2005.542 33.5 8.945 -6.392 2005-Jun 2005.458 33.7 8.935 -6.251 2005-May 2005.375 34.2 8.962 -5.986 2005-Apr 2005.292 36.9 8.963 -5.606 2005-Mar 2005.208 38.0 9.139 -5.092 2005-Feb 2005.125 38.3 9.215 -5.277 2005-Jan 2005.042 38.7 9.262 -5.407 2004-Dec 2004.958 40.4 9.156 -5.284 2004-Nov 2004.875 41.9 9.105 -5.837 2004-Oct 2004.792 42.2 9.065 -6.227 2004-Sep 2004.708 42.4 9.032 -6.487 2004-Aug 2004.625 42.7 8.980 -6.505 2004-Jul 2004.542 42.9 8.919 -6.410 2004-Jun 2004.458 43.2 8.897 -6.344 2004-May 2004.375 43.4 8.894 -6.292 2004-Apr 2004.292 45.2 8.959 -5.524 2004-Mar 2004.208 46.7 9.192 -5.545 2004-Feb 2004.125 47.9 9.307 -5.149 2004-Jan 2004.042 48.7 9.265 -5.216 2003-Dec 2003.958 49.4 9.195 -5.586 2003-Nov 2003.875 50.0 9.049 -5.422 2003-Oct 2003.792 50.5 8.865 -6.388 2003-Sep 2003.708 51.0 8.793 -6.329 2003-Aug 2003.625 52.0 8.874 -6.269 2003-Jul 2003.542 53.0 8.936 -5.957 2003-Jun 2003.458 54.0 8.975 -6.447 2003-May 2003.375 54.9 8.863 -5.918 2003-Apr 2003.292 55.9 8.945 -5.817 2003-Mar 2003.208 56.8 9.151 -5.598 2003-Feb 2003.125 57.5 9.231 -5.578 2003-Jan 2003.042 58.0 9.217 -5.534 2002-Dec 2002.958 58.4 9.132 -6.300 2002-Nov 2002.875 58.9 9.096 -6.191 2002-Oct 2002.792 59.3 9.037 -6.000 2002-Sep 2002.708 59.7 9.009 -6.107 2002-Aug 2002.625 60.1 9.024 -6.213 2002-Jul 2002.542 60.6 9.028 -5.862 2002-Jun 2002.458 61.0 8.969 -5.733 2002-May 2002.375 61.7 8.989 -5.551 2002-Apr 2002.292 62.4 9.059 -5.671 2002-Mar 2002.208 63.3 9.142 -5.311 2002-Feb 2002.125 64.4 9.198 -5.368 2002-Jan 2002.042 64.8 9.164 -5.384 2001-Dec 2001.958 65.2 9.120 -5.409 2001-Nov 2001.875 65.5 9.074 -5.470 2001-Oct 2001.792 65.5 9.038 -5.474 2001-Sep 2001.708 65.6 9.012 -5.422 2001-Aug 2001.625 65.7 8.986 -5.371 2001-Jul 2001.542 65.8 8.960 -5.319 2001-Jun 2001.458 65.9 8.934 -5.268 2001-May 2001.375 66.0 8.912 -5.190 2001-Apr 2001.292 66.5 8.946 -4.842 2001-Mar 2001.208 67.5 9.093 -5.623 2001-Feb 2001.125 69.3 9.185 -6.248 2001-Jan 2001.042 69.8 9.136 -6.284 2000-Dec 2000.958 70.1 9.095 -6.009 2000-Nov 2000.875 70.4 9.103 -5.313 2000-Oct 2000.792 70.7 9.091 -5.118 2000-Sep 2000.708 70.8 9.074 -5.063 2000-Aug 2000.625 71.0 9.056 -5.012 2000-Jul 2000.542 71.2 9.036 -5.089 2000-Jun 2000.458 71.3 9.015 -5.167 2000-May 2000.375 71.5 8.998 -5.247 2000-Apr 2000.292 72.0 9.056 -5.384 2000-Mar 2000.208 72.5 9.201 -5.287 2000-Feb 2000.125 73.0 9.234 -5.449 2000-Jan 2000.042 73.5 9.250 -5.262 1999-Dec 1999.958 74.2 9.176 -5.478 1999-Nov 1999.875 74.7 9.071 -5.406 1999-Oct 1999.792 75.1 8.978 -5.493 1999-Sep 1999.708 75.5 8.913 -5.802 1999-Aug 1999.625 75.6 8.920 -5.937 1999-Jul 1999.542 75.8 8.942 -6.040 1999-Jun 1999.458 75.9 8.963 -6.142 1999-May 1999.375 76.1 8.994 -6.182 1999-Apr 1999.292 76.2 9.040 -6.140 1999-Mar 1999.208 76.4 9.085 -6.099 1999-Feb 1999.125 78.3 9.065 -4.889 1999-Jan 1999.042 80.5 9.211 -5.682 1998-Dec 1998.958 81.1 9.170 -5.911 1998-Nov 1998.875 81.6 9.113 -5.509 1998-Oct 1998.792 81.8 9.058 -5.589 1998-Sep 1998.708 81.9 9.003 -5.669 1998-Aug 1998.625 82.1 8.964 -5.679 1998-Jul 1998.542 82.2 8.941 -5.616 1998-Jun 1998.458 82.4 8.919 -5.553 1998-May 1998.375 82.5 8.897 -5.490 1998-Apr 1998.292 85.1 9.083 -5.937 1998-Mar 1998.208 87.0 9.106 -5.609 1998-Feb 1998.125 87.7 9.111 -5.313 1998-Jan 1998.042 88.5 9.168 -5.311 1997-Dec 1997.958 89.5 9.037 -6.296 1997-Nov 1997.875 90.5 9.049 -5.938 1997-Oct 1997.792 90.9 9.024 -6.110 1997-Sep 1997.708 91.0 9.000 -6.283 1997-Aug 1997.625 91.1 8.980 -6.330 1997-Jul 1997.542 91.3 8.961 -6.372 1997-Jun 1997.458 91.4 8.942 -6.414 1997-May 1997.375 91.5 8.933 -6.376 1997-Apr 1997.292 94.1 9.070 -5.451 1997-Mar 1997.208 95.9 9.098 -5.171 1997-Feb 1997.125 97.0 9.136 -5.192 1997-Jan 1997.042 98.0 9.226 -5.270 1996-Dec 1996.958 98.4 9.153 -5.702 1996-Nov 1996.875 98.7 9.085 -6.070 1996-Oct 1996.792 99.2 9.010 -6.271 1996-Sep 1996.708 99.6 8.939 -6.254 1996-Aug 1996.625 100.0 8.942 -6.239 1996-Jul 1996.542 100.5 8.937 -5.906 1996-Jun 1996.458 100.7 8.954 -5.736 1996-May 1996.375 100.9 8.972 -5.573 1996-Apr 1996.292 101.1 9.025 -5.431 1996-Mar 1996.208 101.3 9.124 -5.317 1996-Feb 1996.125 101.4 9.223 -5.203 1996-Jan 1996.042 101.5 9.307 -5.098 1995-Dec 1995.958 101.8 9.251 -5.075 1995-Nov 1995.875 102.0 9.194 -5.052 1995-Oct 1995.792 102.3 9.122 -5.364 1995-Sep 1995.708 102.7 9.064 -5.554 1995-Aug 1995.625 103.0 9.030 -5.534 1995-Jul 1995.542 103.3 9.082 -5.174 1995-Jun 1995.458 103.6 9.121 -4.946 1995-May 1995.375 103.9 9.135 -4.964 1995-Apr 1995.292 104.2 9.173 -4.970 1995-Mar 1995.208 104.6 9.224 -4.967 1995-Feb 1995.125 104.9 9.290 -4.944 1995-Jan 1995.042 105.5 9.233 -5.073 1994-Dec 1994.958 106.1 9.248 -5.059 1994-Nov 1994.875 106.6 9.161 -5.767 1994-Oct 1994.792 107.2 9.053 -5.850 1994-Sep 1994.708 107.8 8.968 -6.036 1994-Aug 1994.625 108.3 8.966 -5.817 1994-Jul 1994.542 108.9 9.010 -5.548 1994-Jun 1994.458 109.4 8.998 -5.520 1994-May 1994.375 110.0 8.926 -5.467 1994-Apr 1994.292 111.2 8.982 -5.294 1994-Mar 1994.208 112.2 9.088 -5.220 1994-Feb 1994.125 113.1 9.128 -4.993 1994-Jan 1994.042 114.0 9.163 -4.983 1993-Dec 1993.958 114.7 9.142 -5.206 1993-Nov 1993.875 115.4 9.113 -5.306 1993-Oct 1993.792 115.6 9.083 -5.452 1993-Sep 1993.708 115.8 9.080 -5.548 1993-Aug 1993.625 116.0 9.077 -5.643 1993-Jul 1993.542 116.1 9.039 -5.788 1993-Jun 1993.458 116.3 8.989 -5.950 1993-May 1993.375 116.5 8.943 -6.103 1993-Apr 1993.292 118.4 9.094 -5.522 1993-Mar 1993.208 119.7 9.100 -5.023 1993-Feb 1993.125 120.5 9.223 -4.279 1993-Jan 1993.042 121.1 9.181 -5.234 1992-Dec 1992.958 121.8 9.192 -5.098 1992-Nov 1992.875 122.4 9.232 -5.051 1992-Oct 1992.792 122.9 9.092 -5.069 1992-Sep 1992.708 123.1 9.022 -5.149 1992-Aug 1992.625 123.4 9.080 -5.253 1992-Jul 1992.542 123.7 9.061 -5.387 1992-Jun 1992.458 124.0 9.015 -5.531 1992-May 1992.375 124.1 9.059 -5.581 1992-Apr 1992.292 124.2 9.103 -5.630 1992-Mar 1992.208 124.3 9.148 -5.680 1992-Feb 1992.125 124.4 9.192 -5.730 1992-Jan 1992.042 124.5 9.236 -5.780 1991-Dec 1991.958 124.6 9.127 -5.860 1991-Nov 1991.875 124.7 9.018 -5.939 1991-Oct 1991.792 125.2 8.957 -5.833 1991-Sep 1991.708 125.8 9.058 -5.318 1991-Aug 1991.625 126.3 9.114 -4.964 1991-Jul 1991.542 126.9 9.084 -5.140 1991-Jun 1991.458 127.5 9.070 -5.334 1991-May 1991.375 128.1 8.990 -5.433 1991-Apr 1991.292 129.5 9.071 -5.260 1991-Mar 1991.208 130.4 9.159 -5.462 1991-Feb 1991.125 130.9 9.205 -5.234 1991-Jan 1991.042 132.6 9.138 -5.067 1990-Dec 1990.958 134.5 9.210 -5.050 1990-Nov 1990.875 134.8 9.089 -5.526 1990-Oct 1990.792 135.1 8.997 -5.902 1990-Sep 1990.708 135.2 8.955 -6.103 1990-Aug 1990.625 135.4 8.913 -6.304 1990-Jul 1990.542 135.6 8.892 -6.325 1990-Jun 1990.458 135.8 8.888 -6.182 1990-May 1990.375 135.9 8.885 -6.038 1990-Apr 1990.292 136.9 8.933 -6.109 1990-Mar 1990.208 137.6 8.991 -5.597 1990-Feb 1990.125 138.1 9.021 -5.422 1990-Jan 1990.042 138.5 9.074 -5.369 1989-Dec 1989.958 139.5 8.995 -5.469 1989-Nov 1989.875 140.5 9.040 -5.393 1989-Oct 1989.792 140.8 8.966 -5.492 1989-Sep 1989.708 141.0 8.898 -5.577 1989-Aug 1989.625 141.1 8.930 -5.541 1989-Jul 1989.542 141.2 8.962 -5.504 1989-Jun 1989.458 141.3 8.994 -5.468 1989-May 1989.375 141.4 9.026 -5.431 1989-Apr 1989.292 141.5 9.058 -5.394 1989-Mar 1989.208 142.4 9.168 -5.138 1989-Feb 1989.125 143.5 9.227 -4.841 1989-Jan 1989.042 144.5 9.187 -4.988 1988-Dec 1988.958 145.5 9.119 -5.094 1988-Nov 1988.875 146.5 9.097 -5.302 1988-Oct 1988.792 147.0 9.033 -5.725 1988-Sep 1988.708 147.1 9.006 -5.811 1988-Aug 1988.625 147.2 8.979 -5.896 1988-Jul 1988.542 147.3 8.952 -5.982 1988-Jun 1988.458 147.4 8.925 -6.068 1988-May 1988.375 147.5 8.900 -6.142 1988-Apr 1988.292 148.1 8.943 -5.945 1988-Mar 1988.208 148.3 9.016 -5.898 1988-Feb 1988.125 148.3 9.089 -5.851 1988-Jan 1988.042 148.4 9.161 -5.804 1987-Dec 1987.958 148.6 9.188 -5.605 1987-Nov 1987.875 150.6 9.053 -5.317 1987-Oct 1987.792 150.8 9.019 -5.416 1987-Sep 1987.708 151.0 8.984 -5.516 1987-Aug 1987.625 151.2 8.963 -5.533 1987-Jul 1987.542 151.3 8.943 -5.537 1987-Jun 1987.458 151.5 8.925 -5.538 1987-May 1987.375 151.9 8.970 -5.414 1987-Apr 1987.292 152.2 9.021 -5.356 1987-Mar 1987.208 152.6 9.081 -5.300 1987-Feb 1987.125 153.0 9.153 -5.172 1987-Jan 1987.042 154.1 9.085 -5.229 1986-Dec 1986.958 155.2 9.141 -5.213 1986-Nov 1986.875 156.4 9.047 -5.851 1986-Oct 1986.792 157.4 8.964 -5.914 1986-Sep 1986.708 158.4 8.925 -5.867 1986-Aug 1986.625 159.5 8.943 -5.657 1986-Jul 1986.542 160.5 8.901 -5.499 1986-Jun 1986.458 161.5 8.931 -5.500 1986-May 1986.375 162.5 8.873 -6.304 1986-Apr 1986.292 164.5 9.044 -5.561 1986-Mar 1986.208 166.1 9.099 -5.143 1986-Feb 1986.125 167.5 9.194 -5.065 1986-Jan 1986.042 167.7 9.172 -5.399 1985-Dec 1985.958 168.0 9.141 -5.760 1985-Nov 1985.875 168.3 9.077 -5.851 1985-Oct 1985.792 168.4 9.014 -5.941 1985-Sep 1985.708 168.6 8.967 -5.995 1985-Aug 1985.625 168.7 8.941 -6.005 1985-Jul 1985.542 168.8 8.914 -6.014 1985-Jun 1985.458 168.9 8.888 -6.024 1985-May 1985.375 169.1 8.877 -5.927 1985-Apr 1985.292 171.7 9.036 -5.621 1985-Mar 1985.208 173.1 9.171 -5.116 1985-Feb 1985.125 174.1 9.236 -5.067 1985-Jan 1985.042 175.0 9.280 -4.056 1984-Dec 1984.958 175.5 9.222 -4.398 1984-Nov 1984.875 175.9 9.118 -5.539 1984-Oct 1984.792 176.6 9.033 -5.609 1984-Sep 1984.708 177.4 8.983 -5.905 1984-Aug 1984.625 178.2 9.039 -5.268 1984-Jul 1984.542 178.9 9.062 -5.176 1984-Jun 1984.458 179.7 9.026 -5.381 1984-May 1984.375 180.5 8.981 -5.000 1984-Apr 1984.292 181.3 9.083 -5.062 1984-Mar 1984.208 182.8 9.205 -4.521 1984-Feb 1984.125 185.2 9.191 -4.205 1984-Jan 1984.042 187.6 9.333 -4.357 1983-Dec 1983.958 190.4 9.161 -4.952 1983-Nov 1983.875 193.2 9.204 -5.051 1983-Oct 1983.792 193.9 9.075 -5.840 1983-Sep 1983.708 194.5 9.043 -6.083 1983-Aug 1983.625 194.7 9.054 -5.961 1983-Jul 1983.542 194.9 9.064 -5.839 1983-Jun 1983.458 195.0 9.078 -5.709 1983-May 1983.375 195.2 9.121 -5.518 1983-Apr 1983.292 195.3 9.164 -5.326 1983-Mar 1983.208 196.2 9.184 -5.335 1983-Feb 1983.125 197.6 9.206 -5.400 1983-Jan 1983.042 199.0 9.338 -4.834 1982-Dec 1982.958 199.4 9.284 -5.098 1982-Nov 1982.875 199.9 9.201 -5.296 1982-Oct 1982.792 200.2 9.117 -5.553 1982-Sep 1982.708 200.5 9.036 -5.847 1982-Aug 1982.625 200.7 9.024 -5.976 1982-Jul 1982.542 201.0 9.027 -6.069 1982-Jun 1982.458 201.3 9.016 -5.920 1982-May 1982.375 201.5 9.009 -5.719 1982-Apr 1982.292 202.3 9.065 -5.317 1982-Mar 1982.208 203.6 9.219 -4.992 1982-Feb 1982.125 205.5 9.167 -5.078 1982-Jan 1982.042 207.5 9.286 -4.828 1981-Dec 1981.958 208.1 9.242 -5.218 1981-Nov 1981.875 208.6 9.088 -5.613 1981-Oct 1981.792 209.0 8.998 -5.885 1981-Sep 1981.708 209.3 8.975 -5.999 1981-Aug 1981.625 209.6 8.956 -6.041 1981-Jul 1981.542 209.9 8.932 -5.937 1981-Jun 1981.458 210.2 8.891 -5.900 1981-May 1981.375 210.5 8.842 -5.894 1981-Apr 1981.292 211.5 8.939 -5.333 1981-Mar 1981.208 212.6 9.130 -5.032 1981-Feb 1981.125 213.8 9.179 -5.032 1981-Jan 1981.042 215.0 9.248 -4.789 1980-Dec 1980.958 215.5 9.210 -4.802 1980-Nov 1980.875 216.1 9.093 -5.558 1980-Oct 1980.792 216.2 9.048 -5.612 1980-Sep 1980.708 216.4 9.004 -5.665 1980-Aug 1980.625 216.6 8.971 -5.744 1980-Jul 1980.542 216.7 8.963 -5.873 1980-Jun 1980.458 216.9 8.955 -6.002 1980-May 1980.375 217.6 8.978 -5.526 1980-Apr 1980.292 219.2 9.012 -5.396 1980-Mar 1980.208 219.7 9.070 -5.097 1980-Feb 1980.125 219.9 9.124 -5.067 1980-Jan 1980.042 220.0 9.168 -5.053 1979-Dec 1979.958 220.5 9.108 -5.200 1979-Nov 1979.875 221.0 9.132 -4.773 1979-Oct 1979.792 221.4 9.030 -5.034 1979-Sep 1979.708 221.6 8.970 -5.094 1979-Aug 1979.625 221.8 8.962 -4.906 1979-Jul 1979.542 222.1 8.952 -4.858 1979-Jun 1979.458 222.3 8.934 -5.292 1979-May 1979.375 222.5 8.916 -5.727 1979-Apr 1979.292 223.1 8.994 -5.436 1979-Mar 1979.208 223.6 9.101 -5.193 1979-Feb 1979.125 224.3 9.162 -4.847 1979-Jan 1979.042 224.9 9.200 -4.620 1978-Dec 1978.958 225.6 9.248 -4.682 1978-Nov 1978.875 227.0 9.186 -5.847 1978-Oct 1978.792 228.3 9.162 -5.283 1978-Sep 1978.708 229.2 9.080 -5.696 1978-Aug 1978.625 229.7 9.074 -5.790 1978-Jul 1978.542 230.3 9.013 -5.927 1978-Jun 1978.458 230.9 8.993 -5.925 1978-May 1978.375 231.6 8.981 -5.786 1978-Apr 1978.292 235.0 9.058 -5.377 1978-Mar 1978.208 236.8 9.179 -4.730 1978-Feb 1978.125 238.1 9.271 -4.740 1978-Jan 1978.042 238.6 9.240 -4.940 1977-Dec 1977.958 239.2 9.222 -5.580 1977-Nov 1977.875 239.8 9.136 -5.660 1977-Oct 1977.792 240.7 9.122 -5.520 1977-Sep 1977.708 241.6 9.145 -5.070 1977-Aug 1977.625 242.6 9.089 -5.080 1977-Jul 1977.542 243.5 9.151 -5.100 1977-Jun 1977.458 244.5 9.043 -5.380 1977-May 1977.375 245.4 9.168 -5.150