Year | Value | 2022 | 86.325104926 | 2021 | 86.014844336626 | 2020 | 87.14092598851 | 2019 | 87.090287835539 | 2018 | 86.794005789862 | 2017 | 86.727437414481 | 2016 | 86.681570284479 | 2015 | 86.25196641265 | 2014 | 86.041818546811 | 2013 | 86.0342195545 | 2012 | 86.138441298506 | 2011 | 86.128157965608 | 2010 | 86.11558962413 | 2009 | 86.841189325513 | 2008 | 86.232283991963 | 2007 | 85.188577092772 | 2006 | 84.306362754933 | 2005 | 84.718030739057 | 2004 | 85.667412468283 | 2003 | 85.690481898825 | 2002 | 81.972821896685 | 2001 | 81.969883421614 | 2000 | 81.437453399716 | 1999 | 80.860554402793 | 1998 | 80.340100866417 | 1997 | 81.507328223746 | 1996 | 80.618335457045 | 1995 | 80.565978948509 | 1994 | 81.55369985729 | 1993 | 81.991489118638 | 1992 | 80.71567906819 | 1991 | 79.765936043299 |
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