Year | Value | 2022 | 35.899512639407 | 2021 | 36.540122101117 | 2020 | 37.933081019173 | 2019 | 41.465141401615 | 2018 | 42.703646673646 | 2017 | 44.154622535312 | 2016 | 46.672348753641 | 2015 | 45.421018154095 | 2014 | 59.148228036938 | 2013 | 62.171598953663 | 2012 | 63.540470160453 | 2011 | 65.084006460559 | 2010 | 66.084545541212 | 2009 | 67.316219441688 | 2008 | 67.033997958053 | 2007 | 62.0371003725 | 2006 | 60.046156139999 | 2005 | 59.691749766957 | 2004 | 59.931104163728 | 2003 | 60.520538519125 | 2002 | 60.367501720284 | 2001 | 60.972578944633 | 2000 | 61.669345845975 | 1999 | 62.478155771224 | 1998 | 64.117763373624 | 1997 | 66.313760191193 | 1996 | 69.324438853455 | 1995 | 69.626644075448 | 1994 | 73.869775729842 | 1993 | 74.234021018291 | 1992 | 75.986214896696 | 1991 | 75.788146148316 | 1990 | 74.421565883529 | 1989 | 76.306176344118 | 1988 | 77.953668038286 | 1987 | 79.676185906475 | 1986 | 81.444967663859 | 1985 | 80.883804532732 | 1984 | 80.26167701952 | 1983 | 81.768765703159 | 1982 | 82.387284909299 | 1981 | 88.858459703068 | 1980 | 88.669392766781 | 1979 | 86.299658214489 | 1978 | 83.693620441359 | 1977 | 84.026377721517 | 1976 | 85.439663091031 | 1975 | 85.633702481361 | 1974 | 88.567251564254 | 1973 | 82.770151427779 | 1972 | 83.069809115651 | 1971 | 86.143984795511 | 1970 | 86.379503001177 |
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