Year | Value | 2021 | 31.03638 | 2020 | 28.89977 | 2019 | 68.04358 | 2018 | 78.15964 | 2017 | 67.32035 | 2016 | 43.940435 | 2015 | 46.043 | 2014 | 65.517 | 2013 | 70.431 | 2012 | 70.977 | 2011 | 50.973 | 2010 | 47.908 | 2009 | 64.323 | 2008 | 70.934 | 2007 | 72.888 | 2006 | 80.997 | 2005 | 68.112 | 2004 | 63.692 | 2003 | 56.455 | 2002 | 51.298 | 2001 | 50.818 | 2000 | 60.611 | 1999 | 51.7999992371 | 1998 | 38 | 1997 | 41.5 | 1996 | 62.2000007629 | 1995 | 58.2999992371 | 1994 | 55.5 | 1993 | 28.7999992371 | 1992 | 41.5 | 1991 | 41.5 | 1990 | 39.9000015259 | 1989 | 51.5999984741 | 1988 | 26.8999996185 | 1987 | 25.6000003815 | 1986 | 24.7999992371 | 1985 | 33.2000007629 | 1984 | 25.1000003815 | 1983 | 46.2000007629 | 1982 | 20.7999992371 | 1981 | 33.2000007629 | 1980 | 20.8999996185 | 1979 | 16 | 1978 | 13.6000003815 | 1977 | 13.3999996185 | 1976 | 14.1999998093 |
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