Year | Value | 2021 | 58.59905 | 2020 | 32.45122 | 2019 | 47.338148 | 2018 | 41.138 | 2017 | 37.428 | 2016 | 21.343723 | 2015 | 43.198175952 | 2014 | 43.736004 | 2013 | 44.646 | 2012 | 17.648311239282 | 2011 | 17.648311239282 | 2010 | 17.404 | 2009 | 70.109 | 2008 | 49.174 | 2007 | 47.378 | 2006 | 46.456 | 2005 | 47.883 | 2004 | 41.791 | 2003 | 34.315 | 2002 | 35.641 | 2001 | 41.767 | 2000 | 45.482 | 1999 | 54.7000007629 | 1998 | 49 | 1997 | 19.6000003815 | 1996 | 21.7999992371 | 1995 | 36.0999984741 | 1994 | 34.4000015259 | 1993 | 17.2000007629 | 1992 | 15.8999996185 | 1991 | 14.8000001907 | 1990 | 15.1999998093 | 1989 | 14.3999996185 | 1988 | 12.6999998093 | 1987 | 11.1999998093 | 1986 | 10.5 | 1985 | 10 | 1984 | 7.1999998093 | 1983 | 6.6999998093 | 1982 | 4.9000000954 | 1981 | 7.0999999046 | 1980 | 17.6000003815 | 1979 | 21.7000007629 | 1978 | 14.6000003815 | 1977 | 25.8999996185 | 1976 | 23.3999996185 | 1975 | 19.6000003815 | 1974 | 17.8999996185 | 1973 | 12.6000003815 | 1972 | 15.3000001907 | 1971 | 12.6000003815 | 1970 | 9.6999998093 |
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