Year | Value | 2022 | 88.912862844714 | 2021 | 89.001134462334 | 2020 | 88.928281446032 | 2019 | 89.177372389238 | 2018 | 88.353173526364 | 2017 | 88.322064882064 | 2016 | 88.268494898998 | 2015 | 87.972101570981 | 2014 | 87.514326631045 | 2013 | 87.86178507796 | 2012 | 88.414481256577 | 2011 | 87.890854151583 | 2010 | 87.430922978982 | 2009 | 87.522452202472 | 2008 | 87.598015207801 | 2007 | 87.588723726906 | 2006 | 86.86439434348 | 2005 | 85.936441792091 | 2004 | 84.126739174828 | 2003 | 84.084524362911 | 2002 | 84.823818820028 | 2001 | 84.779640962989 | 2000 | 83.570282173134 | 1999 | 83.450170947792 | 1998 | 83.37204732698 | 1997 | 83.721555601468 | 1996 | 82.850126684312 | 1995 | 82.741072037631 | 1994 | 83.28504274875 | 1993 | 83.352320425766 | 1992 | 83.635983840493 | 1991 | 83.702457931117 |
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