| Year | Value | | 2022 | 136.37724550898 | | 2021 | 130.14745508982 | | 2020 | 130.27395209581 | | 2019 | 124.34672278062 | | 2018 | 122.4725555268 | | 2017 | 121.1878742515 | | 2016 | 120.29247152985 | | 2015 | 118.61766231118 | | 2014 | 116.66167664671 | | 2013 | 111.84131736527 | | 2012 | 108.6377245509 | | 2011 | 104.80538922156 | | 2010 | 100 | | 2009 | 92.773702769446 | | 2008 | 88.616638076126 | | 2007 | 83.1676851961 | | 2006 | 80.899475599843 | | 2005 | 77.478119445883 | | 2004 | 73.347459344104 | | 2003 | 70.377738450846 | | 2002 | 65.575302335429 | | 2001 | 60.947849933994 | | 2000 | 56.005175216229 | | 1999 | 53.438885563107 | | 1998 | 53.240688491014 | | 1997 | 49.326296317175 | | 1996 | 47.881935154296 | | 1995 | 45.802182747999 | | 1994 | 38.209103508855 | | 1993 | 28.981196007271 | | 1992 | 27.482757798429 | | 1991 | 28.711237926317 | | 1990 | 29.729560813968 | | 1989 | 29.476688687504 | | 1988 | 27.764676047527 | | 1987 | 27.081237867896 | | 1986 | 31.19040992293 | | 1985 | 37.871018128827 |
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