Year | Value | 2022 | 84.939789506906 | 2021 | 85.580515142751 | 2020 | 85.606749504772 | 2019 | 84.743686257355 | 2018 | 83.577066303886 | 2017 | 83.051687036771 | 2016 | 82.920619170054 | 2015 | 85.311992080541 | 2014 | 83.88460390206 | 2013 | 83.744773041537 | 2012 | 84.281826869606 | 2011 | 84.330213537405 | 2010 | 84.272360764363 | 2009 | 84.451591412693 | 2008 | 83.153631890936 | 2007 | 80.879957602443 | 2006 | 80.970386214003 | 2005 | 81.835843060457 | 2004 | 81.874780694189 | 2003 | 83.274633761313 | 2002 | 83.068011830646 | 2001 | 82.275772740895 | 2000 | 81.021988465165 | 1999 | 80.71188158767 | 1998 | 79.88287910735 | 1997 | 77.484384372037 | 1996 | 79.223980885261 | 1995 | 75.905690636102 | 1994 | 77.38746390841 | 1993 | 79.61578425377 | 1992 | 83.463211645505 | 1991 | 77.968383245615 | 1990 | 79.318779006014 | 1989 | 79.932250425733 | 1988 | 79.029978382754 | 1987 | 79.006863307675 | 1986 | 73.988191873172 | 1985 | 73.328931108792 | 1984 | 71.405004839715 | 1983 | 72.846831897776 | 1982 | 70.437282727355 | 1981 | 80.374637990695 | 1980 | 78.256277642631 | 1979 | 78.643473034271 | 1978 | 73.218018133231 | 1977 | 74.25659465073 | 1976 | 87.133566243723 | 1975 | 82.884212445987 | 1974 | 80.281147300119 | 1973 | 83.41198530516 | 1972 | 87.447099234478 | 1971 | 87.49270873764 | 1970 | 82.432433006608 | 1969 | 88.780149608439 | 1968 | 89.150578820039 | 1967 | 88.189319655647 | 1966 | 89.239598229894 | 1965 | 87.969923082518 |
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