Year | Value | 2023 | 84.2 | 2022 | 80.5 | 2021 | 80.7 | 2020 | 81.3 | 2019 | 73.9 | 2018 | 70.4 | 2017 | 67.5 | 2016 | 60.9 | 2015 | 58.3 | 2014 | 54.6 | 2013 | 51 | 2012 | 48.6 | 2011 | 45.7 | 2010 | 40.7 | 2009 | 39.2 | 2008 | 33.8 | 2007 | 30.9 | 2006 | 28.2 | 2005 | 21 | 2004 | 19.1 | 2003 | 13.2 | 2002 | 9.15 | 2001 | 4.53 | 2000 | 2.87 | 1999 | 2.04 | 1998 | 1.48 | 1997 | 0.786 | 1996 | 0.451 | 1995 | 0.105 | 1994 | 0.0377 | 1993 | 0.0255 | 1992 | 0.0129 | 1991 | 0.00329 |
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