| Year | Value | | 2022 | 85.06074504 | | 2021 | 74.8623274 | | 2020 | 70.48342785 | | 2019 | 67.85071029 | | 2018 | 74.38718292 | | 2017 | 63.077347 | | 2016 | 61.32425277 | | 2015 | 58.14173496 | | 2014 | 55.63846022 | | 2013 | 58.4593 | | 2012 | 55.82999799 | | 2011 | 54.3899983 | | 2010 | 53.68 | | 2009 | 48.83 | | 2008 | 44.53 | | 2007 | 40.79 | | 2006 | 37.99 | | 2005 | 35 | | 2004 | 33.24 | | 2003 | 29.04 | | 2002 | 28.04 | | 2001 | 27.22211698 | | 2000 | 23.11087424 | | 1999 | 14.37841019 | | 1998 | 4.558519565 | | 1997 | 2.276737834 | | 1996 | 1.023289903 | | 1995 | 0.524412787 | | 1994 | 0.192304619 | | 1993 | 0.122462053 | | 1992 | 0.070053433 | | 1991 | 0.035063256 | | 1990 | 0.017544562 |
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