| Year | Value | | 2021 | 199.3720633438 | | 2020 | 186.86262188562 | | 2019 | 180.75026365416 | | 2018 | 173.0158221164 | | 2017 | 168.17523886375 | | 2016 | 162.20084729665 | | 2015 | 151.52946414117 | | 2014 | 131.15527281408 | | 2013 | 121.63895630602 | | 2012 | 113.94353976761 | | 2011 | 108.44046485933 | | 2010 | 100 | | 2009 | 93.589675940172 | | 2008 | 83.826166102897 | | 2007 | 73.460347108994 | | 2006 | 67.390301376828 | | 2005 | 61.44900897585 | | 2004 | 54.531519924475 | | 2003 | 49.176842513719 | | 2002 | 43.265368445577 | | 2001 | 37.36578521057 | | 2000 | 30.759553654007 | | 1999 | 25.463467908942 | | 1998 | 13.708720604855 | | 1997 | 10.736302321062 | | 1996 | 9.3553310940778 | | 1995 | 6.3317791444703 | | 1994 | 2.1289426311843 | | 1993 | 0.52215463296409 | | 1992 | 0.053595784106737 |
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