| Year | Value | | 2022 | 75.61131603 | | 2021 | 73.0532414 | | 2020 | 70.05275998 | | 2019 | 64.0808813 | | 2018 | 59.2 | | 2017 | 54.3 | | 2016 | 53.2 | | 2015 | 50.3 | | 2014 | 47.9 | | 2013 | 45.8 | | 2012 | 42.30011749 | | 2011 | 38.3 | | 2010 | 34.3 | | 2009 | 28.9 | | 2008 | 22.6 | | 2007 | 16 | | 2006 | 10.52315262 | | 2005 | 8.523257003 | | 2004 | 7.3 | | 2003 | 6.2 | | 2002 | 4.595704331 | | 2001 | 2.639650215 | | 2000 | 1.775913207 | | 1999 | 0.708187957 | | 1998 | 0.168540297 | | 1997 | 0.032394861 | | 1996 | 0.013081692 | | 1995 | 0.00495471 | | 1994 | 0.001168115 | | 1993 | 0.00016868 |
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