Year | Value | 2022 | 78.25623357454 | 2021 | 76.60311068481 | 2020 | 80.407293736835 | 2019 | 79.174998793029 | 2018 | 79.535051732328 | 2017 | 79.961963446065 | 2016 | 81.05182219771 | 2015 | 83.890144234842 | 2014 | 85.674836853199 | 2013 | 85.655816984827 | 2012 | 85.870112084512 | 2011 | 85.070812132667 | 2010 | 84.492076084182 | 2009 | 82.471937956337 | 2008 | 83.806545711488 | 2007 | 80.375944396562 | 2006 | 78.330380628322 | 2005 | 78.084604379372 | 2004 | 78.053428145551 | 2003 | 78.804585774955 | 2002 | 78.369638824902 | 2001 | 77.536520231296 | 2000 | 76.990067278082 | 1999 | 77.41449701646 | 1998 | 78.434239779385 | 1997 | 77.304373341556 | 1996 | 76.173416401205 | 1995 | 74.274072217956 | 1994 | 74.881529990591 | 1993 | 76.345926015196 | 1992 | 82.484127396999 | 1991 | 84.166451075683 | 1990 | 78.561651758328 | 1989 | 75.501788989765 | 1988 | 77.293454276859 | 1987 | 76.14313365611 | 1986 | 75.276408437831 | 1985 | 77.87747327807 | 1984 | 77.777776805287 | 1983 | 82.493181715087 | 1982 | 80.993270919334 | 1981 | 80.114153815749 | 1980 | 80.534001124052 | 1979 | 81.009847620598 | 1978 | 87.443243441869 | 1977 | 89.718737883162 | 1976 | 92.003603843632 | 1975 | 98.677030342697 |
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