Year | Value | 2022 | 41.18 | 2021 | 42.036 | 2020 | 42.912 | 2019 | 43.808 | 2018 | 44.722 | 2017 | 45.654 | 2016 | 46.604 | 2015 | 47.573 | 2014 | 48.556 | 2013 | 49.54 | 2012 | 50.523 | 2011 | 51.508 | 2010 | 52.491 | 2009 | 53.472 | 2008 | 54.449 | 2007 | 55.426 | 2006 | 56.396 | 2005 | 57.362 | 2004 | 58.321 | 2003 | 59.355 | 2002 | 61.065 | 2001 | 62.749 | 2000 | 64.4 | 1999 | 65.008 | 1998 | 65.611 | 1997 | 66.208 | 1996 | 66.8 | 1995 | 67.41 | 1994 | 68.013 | 1993 | 68.61 | 1992 | 69.2 | 1991 | 70.359 | 1990 | 71.49 | 1989 | 72.595 | 1988 | 73.671 | 1987 | 74.723 | 1986 | 75.745 | 1985 | 76.739 | 1984 | 77.703 | 1983 | 78.64 | 1982 | 79.405 | 1981 | 79.432 | 1980 | 79.459 | 1979 | 79.487 | 1978 | 79.514 | 1977 | 79.541 | 1976 | 79.569 | 1975 | 79.596 | 1974 | 79.623 | 1973 | 79.65 | 1972 | 79.677 | 1971 | 79.778 | 1970 | 80.238 | 1969 | 80.69 | 1968 | 81.134 | 1967 | 81.571 | 1966 | 81.999 | 1965 | 82.42 | 1964 | 82.832 | 1963 | 83.238 | 1962 | 83.635 | 1961 | 84.025 | 1960 | 84.407 |
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