| Year | Value | | 2022 | 10.780580675869 | | 2021 | 2.5545069964204 | | 2020 | 0.15481137456211 | | 2019 | 0.77182034649802 | | 2018 | 1.5001250104176 | | 2017 | 1.1293721028235 | | 2016 | -1.125 | | 2015 | 0.46449900464491 | | 2014 | 0.21519615957627 | | 2013 | 2.2165820642978 | | 2012 | 3.4120734908136 | | 2011 | 2.2727272727273 | | 2010 | 1.0305550533357 | | 2009 | 2.3785284590467 | | 2008 | 6.0769683879835 | | 2007 | 2.8992827558339 | | 2006 | 3.1898259147295 | | 2005 | 3.3171782444804 | | 2004 | 2.0553967905033 | | 2003 | 1.7673378076063 | | 2002 | 1.6717843739338 | | 2001 | 3.7767024666589 | | 2000 | 4.611315547378 | | 1999 | 4.0191387559809 | | 1998 | 6.3966866083755 | | 1997 | 4.1706615532119 | | 1996 | 4.3 | | 1995 | 3.950103950104 | | 1994 | 107.3275862069 | | 1993 | 1,500 | | 1992 | 625 | | 1991 | 122.22222222222 | | 1990 | 500 | | 1989 | 1,400 | | 1988 | 185.71428571429 | | 1987 | 133.33326374431 | | 1986 | 50 |
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