| Year | Value | | 2022 | 78.58999918 | | 2021 | 74.20999985 | | 2020 | 70.30000012 | | 2019 | 68.66158021 | | 2018 | 69.84792868 | | 2017 | 58.14 | | 2016 | 53 | | 2015 | 45 | | 2014 | 41 | | 2013 | 38.5 | | 2012 | 36.8 | | 2011 | 35.07 | | 2010 | 30.65 | | 2009 | 26.55 | | 2008 | 23.92 | | 2007 | 20.75544477 | | 2006 | 17.25456172 | | 2005 | 12.73992929 | | 2004 | 7.642408528 | | 2003 | 3.780280814 | | 2002 | 1.854999236 | | 2001 | 1.265651236 | | 2000 | 0.254248276 | | 1999 | 0.128926663 | | 1998 | 0.013078543 | | 1997 | 0.003981962 | | 1996 | 0.000134813 |
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