Year | Value | 2022 | 81.192535022155 | 2021 | 78.73309343883 | 2020 | 78.478616059149 | 2019 | 77.217067418594 | 2018 | 77.45844547985 | 2017 | 77.302364445837 | 2016 | 77.695478816979 | 2015 | 77.119779912978 | 2014 | 80.853339244738 | 2013 | 73.645081783105 | 2012 | 73.739513054882 | 2011 | 72.058419242325 | 2010 | 70.890861576258 | 2009 | 70.587976992303 | 2008 | 68.228062255949 | 2007 | 68.596336704969 | 2006 | 67.916809980767 | 2005 | 68.630689288542 | 2004 | 67.141128924861 | 2003 | 66.648634874284 | 2002 | 67.72582715717 | 2001 | 67.865971843935 | 2000 | 71.568836407183 | 1999 | 70.047738173159 | 1998 | 68.498190147571 | 1997 | 78.380255146905 | 1996 | 78.952152919325 | 1995 | 80.974643272416 | 1994 | 79.769077855515 | 1993 | 79.072758093515 | 1992 | 78.208638354844 | 1991 | 77.819598913155 | 1990 | 74.447751830064 | 1989 | 74.970329180669 | 1988 | 75.700710082238 | 1987 | 79.578000790272 | 1986 | 79.033732495041 | 1985 | 77.610677901444 | 1984 | 77.981455830736 | 1983 | 80.756137014458 | 1982 | 78.702275726239 | 1981 | 80.374749926256 | 1980 | 78.316713300456 | 1979 | 88.361781345196 | 1978 | 88.263226601878 | 1977 | 87.915837704226 | 1976 | 89.616583246766 | 1975 | 85.485155584851 | 1974 | 80.176803816339 | 1973 | 84.406303635513 | 1972 | 85.369458128079 | 1971 | 84.827962365347 | 1970 | 85.456770391089 | 1969 | 86.260079008604 | 1968 | 88.982181214135 | 1967 | 89.017903476907 | 1966 | 90.313272190162 | 1965 | 88.109919571046 | 1964 | 89.182434340223 | 1963 | 90.18505101372 | 1962 | 91.651431307709 | 1961 | 93.275984077225 | 1960 | 88.867674203006 |
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