| Year | Value | | 2022 | 91.03009059 | | 2021 | 91.17964988 | | 2020 | 88.89796078 | | 2019 | 86.13545644 | | 2018 | 83.57717486 | | 2017 | 80.114077 | | 2016 | 79.84209778 | | 2015 | 79.20058292 | | 2014 | 75.83 | | 2013 | 75.2344 | | 2012 | 73.11994377 | | 2011 | 69.74995456 | | 2010 | 68.42 | | 2009 | 66.84 | | 2008 | 63.41 | | 2007 | 59.17 | | 2006 | 53.63 | | 2005 | 46 | | 2004 | 38.58 | | 2003 | 26.98 | | 2002 | 21.94 | | 2001 | 7.219345808 | | 2000 | 6.319062083 | | 1999 | 4.387409055 | | 1998 | 3.315267886 | | 1997 | 2.053454712 | | 1996 | 0.812717072 |
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