| Year | Value | | 2022 | 97.16855413 | | 2021 | 97.57132662 | | 2020 | 96.50506052 | | 2019 | 96.15757918 | | 2018 | 96.02285958 | | 2017 | 95.06942188 | | 2016 | 92.84302568 | | 2015 | 89.8962558 | | 2014 | 87.55682649 | | 2013 | 84.77 | | 2012 | 84.07 | | 2011 | 83.75912015 | | 2010 | 83.7 | | 2009 | 81.6 | | 2008 | 81 | | 2007 | 78.8 | | 2006 | 78.1 | | 2005 | 73.5 | | 2004 | 72.7 | | 2003 | 65.5 | | 2002 | 59.4 | | 2001 | 56.6 | | 2000 | 44.7 | | 1999 | 23.55219445 | | 1998 | 6.781815468 | | 1997 | 3.600801564 | | 1996 | 1.624237192 | | 1995 | 0.81968667 | | 1994 | 0.311359364 | | 1993 | 0.249946523 | | 1992 | 0.098404337 | | 1991 | 0.046124435 | | 1990 | 0.023265092 |
|