Year | Value | 2022 | 57.746484045086 | 2021 | 58.196514836216 | 2020 | 58.68180883228 | 2019 | 59.15814903013 | 2018 | 59.628085047424 | 2017 | 60.090015537756 | 2016 | 60.543587615503 | 2015 | 60.997162897782 | 2014 | 61.460457621909 | 2013 | 61.92372300108 | 2012 | 62.365494743684 | 2011 | 62.785511584325 | 2010 | 63.202861032531 | 2009 | 63.612764099631 | 2008 | 64.017077561417 | 2007 | 64.416246027192 | 2006 | 64.81507578052 | 2005 | 65.209523184512 | 2004 | 65.594771259496 | 2003 | 65.969769114812 | 2002 | 66.332440693655 | 2001 | 66.686491785981 | 2000 | 66.999357905032 | 1999 | 67.262591838952 | 1998 | 67.516724347777 | 1997 | 67.77122875594 | 1996 | 68.024077341151 | 1995 | 68.272766285269 | 1994 | 68.516372387559 | 1993 | 68.759985212228 | 1992 | 69.008937287674 | 1991 | 69.27718432917 | 1990 | 69.56518093605 | 1989 | 69.907222556735 | 1988 | 70.244131101923 | 1987 | 70.586752687542 | 1986 | 70.931870374542 | 1985 | 71.281630933919 | 1984 | 71.625690679581 | 1983 | 71.963568687167 | 1982 | 72.291563267252 | 1981 | 72.620311295604 | 1980 | 73.040546663105 | 1979 | 73.466989633464 | 1978 | 73.867260726534 | 1977 | 74.275332527569 | 1976 | 74.700472718863 | 1975 | 75.131877307825 | 1974 | 75.404878503755 | 1973 | 75.803776913224 | 1972 | 76.19291808913 | 1971 | 76.589023453415 | 1970 | 76.934432010602 | 1969 | 77.241273455867 | 1968 | 77.546687192181 | 1967 | 77.84975892334 | 1966 | 78.145955909128 | 1965 | 78.439778377045 | 1964 | 78.735288364186 | 1963 | 79.024173302997 | 1962 | 79.308557001895 | 1961 | 79.590026036314 | 1960 | 79.837894346894 |
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