Year | Value | 2021 | 58.619896232816 | 2020 | 74.803566832 | 2019 | 62.282614648926 | 2018 | 59.417567396181 | 2017 | 67.760382396899 | 2016 | 75.222272404603 | 2015 | 74.345153335628 | 2014 | 60.06893688644 | 2013 | 56.088992268292 | 2012 | 56.429510433825 | 2011 | 54.763161588005 | 2010 | 63.361825815033 | 2009 | 73.309558099282 | 2008 | 47.909576877524 | 2007 | 57.273367223033 | 2006 | 52.842216475585 | 2005 | 57.492943096627 | 2004 | 62.266359820733 | 2003 | 58.298584611667 | 2002 | 43.577082702294 | 2001 | 35.369264476283 | 2000 | 25.379187403795 | 1999 | 29.532756728391 | 1998 | 49.471706436718 | 1997 | 39.252173039626 | 1996 | 39.27312585659 | 1995 | 43.916887607912 | 1994 | 36.572584229227 | 1993 | 36.06619557036 | 1992 | 62.576319365051 | 1991 | 110.85471454551 | 1990 | 56.211277301458 | 1989 | 107.67839905135 | 1988 | 84.197363139531 | 1987 | 84.535227272727 | 1986 | 93.164755664756 | 1985 | 83.471002811122 | 1984 | 87.99661876585 | 1983 | 97.644402186831 | 1982 | 82.611465469103 | 1981 | 66.999797301466 | 1980 | 38.381936122049 | 1979 | 41.354144279676 | 1978 | 57.18968220037 | 1977 | 62.28192960295 | 1976 | 56.109097844745 | 1975 | 57.449110535189 | 1974 | 43.52377311888 | 1973 | 60.127314814815 | 1972 | 70.894487039065 | 1971 | 70.608899297424 | 1970 | 72.82191313252 |
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