Year | Value | 2022 | 34.346671325927 | 2021 | 35.121753994781 | 2020 | 35.911166135405 | 2019 | 36.726111767005 | 2018 | 37.568804382626 | 2017 | 38.430890145051 | 2016 | 39.309315837672 | 2015 | 40.195216855918 | 2014 | 41.085493221088 | 2013 | 41.981785622661 | 2012 | 42.878933703996 | 2011 | 43.774461465717 | 2010 | 44.694560238445 | 2009 | 45.674180615581 | 2008 | 46.658927719268 | 2007 | 47.646443052225 | 2006 | 48.626779512968 | 2005 | 49.607811617129 | 2004 | 50.598054563867 | 2003 | 51.575124090683 | 2002 | 52.537774923154 | 2001 | 53.484501173808 | 2000 | 54.360281677662 | 1999 | 55.110500257285 | 1998 | 55.838012769246 | 1997 | 56.551401101066 | 1996 | 57.249744209582 | 1995 | 57.93185282172 | 1994 | 58.599575079869 | 1993 | 59.261929604182 | 1992 | 59.915260747568 | 1991 | 60.569021448089 | 1990 | 61.19263499561 | 1989 | 61.728449582191 | 1988 | 62.300075043308 | 1987 | 62.891511838102 | 1986 | 63.480023756219 | 1985 | 64.072857195636 | 1984 | 64.673220079204 | 1983 | 65.275044301897 | 1982 | 65.854091042041 | 1981 | 66.52421669416 | 1980 | 67.203453570551 | 1979 | 67.884804060973 | 1978 | 68.555399511164 | 1977 | 69.03423009421 | 1976 | 69.329306617961 | 1975 | 69.609139458862 | 1974 | 69.895336830234 | 1973 | 70.163167300169 | 1972 | 70.350764812767 | 1971 | 70.46234604111 | 1970 | 70.553546085811 | 1969 | 70.659445813018 | 1968 | 70.773618735854 | 1967 | 70.896179332298 | 1966 | 71.014550835172 | 1965 | 71.096073488561 | 1964 | 71.200732071757 | 1963 | 71.776862461715 | 1962 | 72.338529659926 | 1961 | 72.993884490661 | 1960 | 73.759735994864 |
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