Year | Value | 2022 | 32.455 | 2021 | 32.898 | 2020 | 33.348 | 2019 | 33.805 | 2018 | 34.268 | 2017 | 34.739 | 2016 | 35.216 | 2015 | 35.7 | 2014 | 36.19 | 2013 | 36.683 | 2012 | 37.179 | 2011 | 37.678 | 2010 | 38.179 | 2009 | 38.984 | 2008 | 39.806 | 2007 | 40.637 | 2006 | 41.471 | 2005 | 42.311 | 2004 | 43.154 | 2003 | 44.003 | 2002 | 44.854 | 2001 | 45.709 | 2000 | 46.565 | 1999 | 47.495 | 1998 | 48.428 | 1997 | 49.363 | 1996 | 50.296 | 1995 | 51.232 | 1994 | 52.166 | 1993 | 53.098 | 1992 | 54.027 | 1991 | 54.956 | 1990 | 55.88 | 1989 | 58.496 | 1988 | 61.098 | 1987 | 63.645 | 1986 | 66.115 | 1985 | 68.5 | 1984 | 70.208 | 1983 | 71.867 | 1982 | 73.465 | 1981 | 75.005 | 1980 | 76.482 | 1979 | 76.98 | 1978 | 77.388 | 1977 | 77.791 | 1976 | 78.188 | 1975 | 78.581 | 1974 | 78.969 | 1973 | 79.351 | 1972 | 79.728 | 1971 | 80.1 | 1970 | 80.441 | 1969 | 80.745 | 1968 | 81.046 | 1967 | 81.343 | 1966 | 81.637 | 1965 | 81.927 | 1964 | 82.213 | 1963 | 82.497 | 1962 | 82.776 | 1961 | 83.052 | 1960 | 83.321 |
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