Year | Value | 2021 | 0.105655573 | 2020 | 0.328962 | 2019 | 0.14 | 2018 | 0.021 | 2017 | 0.34031950189 | 2016 | 0.28589544676761 | 2015 | 0.23060058 | 2014 | 6.588588 | 2013 | 11.592996 | 2012 | 9.1093 | 2011 | 16.9749 | 2010 | 36.2141 | 2009 | 38.312 | 2008 | 47.549 | 2007 | 49.376 | 2006 | 47.815 | 2005 | 47.964 | 2004 | 49.159 | 2003 | 44.208 | 2002 | 40.887 | 2001 | 39.982 | 2000 | 43.118 | 1999 | 40.7000007629 | 1998 | 38.2000007629 | 1997 | 35.7000007629 | 1996 | 35.4000015259 | 1995 | 36.2000007629 | 1994 | 35.4000015259 | 1993 | 32.2000007629 | 1992 | 33 | 1991 | 33.9000015259 | 1990 | 34.2999992371 | 1989 | 33 | 1988 | 26.6000003815 | 1987 | 30.3999996185 | 1986 | 26.7999992371 | 1985 | 24.6000003815 | 1984 | 25.5 | 1983 | 17.8999996185 | 1982 | 19 | 1981 | 17.2000007629 | 1980 | 18.8999996185 | 1979 | 23.7000007629 | 1978 | 20 | 1977 | 16.2000007629 | 1976 | 6.1999998093 | 1975 | 1.1000000238 | 1974 | 1.8999999762 | 1973 | 2.4000000954 | 1972 | 2.9000000954 | 1971 | 2.4000000954 | 1970 | 2.2000000477 |
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