| Year | Value | | 2022 | 87.72420219 | | 2021 | 86.93054425 | | 2020 | 83.05554724 | | 2019 | 81.58186838 | | 2018 | 79.72258277 | | 2017 | 77.61525651 | | 2016 | 74.37664556 | | 2015 | 71.37805901 | | 2014 | 72.13 | | 2013 | 68.4529 | | 2012 | 67.22998933 | | 2011 | 63.6399774 | | 2010 | 62.12 | | 2009 | 59.76 | | 2008 | 55.22 | | 2007 | 49.9 | | 2006 | 43.9 | | 2005 | 36.22 | | 2004 | 31.23 | | 2003 | 25.91 | | 2002 | 17.69 | | 2001 | 7.179356994 | | 2000 | 6.427067495 | | 1999 | 2.9230547 | | 1998 | 1.972063745 | | 1997 | 0.978422157 | | 1996 | 0.277421291 |
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