| Year | Value | | 2023 | 65.0248 | | 2022 | 63.2573 | | 2021 | 61.4112 | | 2020 | 59.9257 | | 2019 | 58.4762 | | 2018 | 57.0617 | | 2017 | 55.6814 | | 2016 | 30.8 | | 2015 | 22.9 | | 2014 | 17 | | 2013 | 12.7 | | 2012 | 9.4 | | 2011 | 7 | | 2010 | 6.5 | | 2009 | 4 | | 2008 | 2.26 | | 2007 | 1.62 | | 2006 | 1.27004 | | 2005 | 0.953611 | | 2004 | 0.781317 | | 2003 | 0.62594 | | 2002 | 0.486972 | | 2001 | 0.343526 | | 2000 | 0.194501 | | 1999 | 0.106 | | 1998 | 0.0947 | | 1997 | 0.0829 | | 1996 | 0.0312 | | 1995 | 0.016 |
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