Year | Value | 2022 | 40.81917680015 | 2021 | 41.678582212961 | 2020 | 42.565282113828 | 2019 | 43.480789605833 | 2018 | 44.425147072953 | 2017 | 45.397650841485 | 2016 | 46.39522465006 | 2015 | 47.401391236896 | 2014 | 48.412647650558 | 2013 | 49.429371150135 | 2012 | 50.448955989847 | 2011 | 51.474760142846 | 2010 | 52.525983283064 | 2009 | 53.642016274844 | 2008 | 54.758338851141 | 2007 | 55.875529836009 | 2006 | 56.987622557282 | 2005 | 58.11229779995 | 2004 | 59.261793762276 | 2003 | 60.407175537439 | 2002 | 61.542088885274 | 2001 | 62.665400418747 | 2000 | 63.708339337331 | 1999 | 64.636071076611 | 1998 | 65.538693891196 | 1997 | 66.430313799507 | 1996 | 67.309172399527 | 1995 | 68.17801011466 | 1994 | 69.030578437403 | 1993 | 69.868403050312 | 1992 | 70.690234675978 | 1991 | 71.499409638011 | 1990 | 72.284194567119 | 1989 | 73.003805905754 | 1988 | 73.709257429721 | 1987 | 74.401460616348 | 1986 | 75.08018441936 | 1985 | 75.747237353732 | 1984 | 76.403479229436 | 1983 | 77.049260141248 | 1982 | 77.677197589372 | 1981 | 78.40469373155 | 1980 | 79.121015138178 | 1979 | 79.810012611183 | 1978 | 80.465665664315 | 1977 | 80.873939757778 | 1976 | 81.044211646781 | 1975 | 81.210831757493 | 1974 | 81.267674814066 | 1973 | 81.477673895704 | 1972 | 81.609292392068 | 1971 | 81.653233561151 | 1970 | 81.677235284713 | 1969 | 81.67054563546 | 1968 | 81.657768395169 | 1967 | 81.64395904211 | 1966 | 81.628593152938 | 1965 | 81.575144875302 | 1964 | 81.490505491829 | 1963 | 81.964492478096 | 1962 | 82.430647720814 | 1961 | 82.891756660829 | 1960 | 83.350325370255 |
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