| Year | Value | | 2022 | 91.54075982 | | 2021 | 87.46977522 | | 2020 | 86.85876183 | | 2019 | 85.77859638 | | 2018 | 81.65804429 | | 2017 | 81.01191108 | | 2016 | 78.0751488 | | 2015 | 75.96001898 | | 2014 | 73.17 | | 2013 | 68.9138 | | 2012 | 68.19987429 | | 2011 | 68.01982379 | | 2010 | 63 | | 2009 | 58.86 | | 2008 | 50.08 | | 2007 | 46.9 | | 2006 | 40.41 | | 2005 | 41.24 | | 2004 | 34.62 | | 2003 | 31.64 | | 2002 | 28.92 | | 2001 | 17.87784832 | | 2000 | 13.11370871 | | 1999 | 7.759798038 | | 1998 | 6.500783995 | | 1997 | 3.920605132 | | 1996 | 1.051527475 | | 1995 | 0.224995699 |
|