| Year | Value | | 2022 | 79.86983290001 | | 2021 | 80.700014158833 | | 2020 | 83.789859739006 | | 2019 | 78.472616552374 | | 2018 | 78.710997362213 | | 2017 | 78.721461650897 | | 2016 | 79.16423550447 | | 2015 | 80.471060602979 | | 2014 | 82.590025450271 | | 2013 | 83.726103187736 | | 2012 | 83.87159341876 | | 2011 | 82.954274375374 | | 2010 | 81.570137019802 | | 2009 | 81.513842321481 | | 2008 | 80.595160815446 | | 2007 | 80.187711385477 | | 2006 | 80.341222713536 | | 2005 | 82.612520956593 | | 2004 | 82.504263100875 | | 2003 | 83.12485329784 | | 2002 | 85.616303109078 | | 2001 | 84.671331985829 | | 2000 | 85.097526118194 | | 1999 | 85.581307835215 | | 1998 | 85.781769891394 | | 1997 | 88.143990783001 | | 1996 | 86.954160652755 | | 1995 | 92.003121925351 |
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