Year | Value | 2022 | 25.99 | 2021 | 26.439 | 2020 | 26.9 | 2019 | 27.373 | 2018 | 27.857 | 2017 | 28.354 | 2016 | 28.862 | 2015 | 29.384 | 2014 | 29.917 | 2013 | 30.456 | 2012 | 31 | 2011 | 32.512 | 2010 | 34.06 | 2009 | 35.642 | 2008 | 37.255 | 2007 | 38.9 | 2006 | 40.569 | 2005 | 42.26 | 2004 | 43.967 | 2003 | 45.693 | 2002 | 47.427 | 2001 | 49.168 | 2000 | 50.908 | 1999 | 52.65 | 1998 | 54.384 | 1997 | 56.107 | 1996 | 57.813 | 1995 | 59.506 | 1994 | 61.169 | 1993 | 62.208 | 1992 | 63.234 | 1991 | 64.252 | 1990 | 65.255 | 1989 | 66.245 | 1988 | 67.22 | 1987 | 68.183 | 1986 | 69.129 | 1985 | 70.06 | 1984 | 70.972 | 1983 | 71.849 | 1982 | 71.942 | 1981 | 72.035 | 1980 | 72.128 | 1979 | 72.221 | 1978 | 72.313 | 1977 | 72.406 | 1976 | 72.498 | 1975 | 72.59 | 1974 | 72.681 | 1973 | 72.773 | 1972 | 72.864 | 1971 | 72.955 | 1970 | 73.046 | 1969 | 73.137 | 1968 | 73.227 | 1967 | 73.318 | 1966 | 73.408 | 1965 | 73.498 | 1964 | 73.587 | 1963 | 73.677 | 1962 | 73.766 | 1961 | 73.856 | 1960 | 74.463 |
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