Year | Value | 2022 | 57.633289811472 | 2021 | 58.1713037201 | 2020 | 58.706973867981 | 2019 | 59.242141288373 | 2018 | 59.776913354028 | 2017 | 60.314296730316 | 2016 | 60.840619576498 | 2015 | 61.370233955819 | 2014 | 61.912503749291 | 2013 | 62.43972559813 | 2012 | 62.953090561568 | 2011 | 63.464647509551 | 2010 | 63.986587309075 | 2009 | 64.502153395982 | 2008 | 65.010131302172 | 2007 | 65.513262162293 | 2006 | 65.928761249634 | 2005 | 66.386261782833 | 2004 | 66.846337466404 | 2003 | 67.290437894187 | 2002 | 67.729541830947 | 2001 | 68.166385586005 | 2000 | 68.592791178405 | 1999 | 68.95480815769 | 1998 | 69.317192733553 | 1997 | 69.681892040346 | 1996 | 70.03671512034 | 1995 | 70.373203489236 | 1994 | 70.766510028457 | 1993 | 71.192881370248 | 1992 | 71.623338299889 | 1991 | 72.052852798367 | 1990 | 72.492059347542 | 1989 | 73.04281821119 | 1988 | 73.603629070266 | 1987 | 74.171819413821 | 1986 | 74.74095423199 | 1985 | 75.309159250647 | 1984 | 75.851249444573 | 1983 | 76.348346018447 | 1982 | 76.796160489402 | 1981 | 77.205478971784 | 1980 | 77.622666635659 | 1979 | 78.009350572914 | 1978 | 78.403832883857 | 1977 | 78.843487298237 | 1976 | 79.272310726292 | 1975 | 79.708182258198 | 1974 | 80.137198288565 | 1973 | 80.558835137882 | 1972 | 80.990867806562 | 1971 | 81.420905841751 | 1970 | 81.831810085994 | 1969 | 82.210708072622 | 1968 | 82.600253064316 | 1967 | 82.979284871549 | 1966 | 83.34933128504 | 1965 | 83.710305758465 | 1964 | 84.07254968972 | 1963 | 84.42256401261 | 1962 | 84.757558703778 | 1961 | 85.072570079304 | 1960 | 85.378170708132 |
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