Year | Value | 2022 | 85.808375784398 | 2021 | 88.619604791604 | 2020 | 87.993489298837 | 2019 | 84.441847126788 | 2018 | 83.539837880685 | 2017 | 83.392958604888 | 2016 | 83.600954870558 | 2015 | 83.28664880476 | 2014 | 80.214653763323 | 2013 | 79.631224504371 | 2012 | 79.108096389085 | 2011 | 77.921821967843 | 2010 | 79.694151380362 | 2009 | 80.31955404387 | 2008 | 79.227537697722 | 2007 | 80.778332158709 | 2006 | 81.245217555371 | 2005 | 81.824368708538 | 2004 | 82.880927469928 | 2003 | 84.683765077383 | 2002 | 86.099958014536 | 2001 | 87.094588910388 | 2000 | 85.941179009356 | 1999 | 86.575987643058 | 1998 | 86.166142198716 | 1997 | 84.990229977691 | 1996 | 83.494245124551 | 1995 | 80.631001210588 | 1994 | 80.38236703192 | 1993 | 80.866347763631 | 1992 | 80.019980492692 | 1991 | 76.235376442568 | 1990 | 76.445741776391 | 1989 | 75.840740866591 | 1988 | 75.580726102405 | 1987 | 75.968722207767 | 1986 | 75.154980379955 | 1985 | 79.676645623749 | 1984 | 81.614195360454 | 1983 | 82.88757184108 | 1982 | 83.790961270942 | 1981 | 82.942928918237 | 1980 | 80.310487420288 | 1979 | 80.077673855606 | 1978 | 78.888318359691 | 1977 | 77.581075626825 | 1976 | 79.286076615252 | 1975 | 81.201802975997 | 1974 | 79.634535212666 | 1973 | 79.469896364534 | 1972 | 81.416456590758 | 1971 | 84.634925522497 | 1970 | 81.051910098819 | 1969 | 82.592546183589 | 1968 | 81.947848653993 | 1967 | 82.131023383509 | 1966 | 85.306679402333 | 1965 | 82.849490808094 | 1964 | 83.368670003702 | 1963 | 82.62025042791 | 1962 | 81.886267222625 | 1961 | 80.86576575392 | 1960 | 79.418099429088 |
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