Year | Value | 2022 | 63.756630943338 | 2021 | 64.297814415559 | 2020 | 64.822796140897 | 2019 | 65.346835836905 | 2018 | 65.869626563479 | 2017 | 66.384139653264 | 2016 | 66.892544007021 | 2015 | 67.390293049589 | 2014 | 67.866721686893 | 2013 | 68.28474995954 | 2012 | 68.691955675902 | 2011 | 69.10968533973 | 2010 | 69.546373092325 | 2009 | 70.014151348798 | 2008 | 70.471614774644 | 2007 | 70.938266388322 | 2006 | 71.341107060347 | 2005 | 71.770214241346 | 2004 | 72.184582189379 | 2003 | 72.582583954894 | 2002 | 72.975977362881 | 2001 | 73.363478619537 | 2000 | 73.732750467775 | 1999 | 74.053718955528 | 1998 | 74.364851005561 | 1997 | 74.677056370858 | 1996 | 74.977870433287 | 1995 | 75.259976945302 | 1994 | 75.582971069044 | 1993 | 75.918524406896 | 1992 | 76.247845128646 | 1991 | 76.576164372083 | 1990 | 76.925748845144 | 1989 | 77.316094033237 | 1988 | 77.719346969256 | 1987 | 78.142926083352 | 1986 | 78.564867136854 | 1985 | 78.985175418465 | 1984 | 79.399842546175 | 1983 | 79.785471339396 | 1982 | 80.12755921425 | 1981 | 80.436462890272 | 1980 | 80.897354455899 | 1979 | 81.425503877218 | 1978 | 81.888249563974 | 1977 | 82.380216620597 | 1976 | 82.855907735235 | 1975 | 83.321662416165 | 1974 | 83.314995399159 | 1973 | 83.732132586763 | 1972 | 84.149635944982 | 1971 | 84.583178536649 | 1970 | 85.00299789526 | 1969 | 85.396184258498 | 1968 | 85.794396465124 | 1967 | 86.177984230286 | 1966 | 86.549505144457 | 1965 | 86.891858251326 | 1964 | 87.233823951989 | 1963 | 87.564785841271 | 1962 | 87.881964846632 | 1961 | 88.183349314886 | 1960 | 88.466625467976 |
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