Year | Value | 2022 | 25.228 | 2021 | 25.739 | 2020 | 26.267 | 2019 | 26.811 | 2018 | 27.371 | 2017 | 27.948 | 2016 | 28.541 | 2015 | 29.152 | 2014 | 29.779 | 2013 | 30.424 | 2012 | 31.085 | 2011 | 31.764 | 2010 | 32.46 | 2009 | 33.174 | 2008 | 33.903 | 2007 | 34.652 | 2006 | 35.407 | 2005 | 36.17 | 2004 | 36.939 | 2003 | 37.716 | 2002 | 38.499 | 2001 | 39.288 | 2000 | 40.081 | 1999 | 40.882 | 1998 | 41.687 | 1997 | 42.456 | 1996 | 43.226 | 1995 | 44.003 | 1994 | 44.781 | 1993 | 45.561 | 1992 | 46.343 | 1991 | 47.129 | 1990 | 47.915 | 1989 | 48.702 | 1988 | 49.489 | 1987 | 50.278 | 1986 | 51.14 | 1985 | 52.032 | 1984 | 52.921 | 1983 | 53.811 | 1982 | 54.697 | 1981 | 55.58 | 1980 | 56.458 | 1979 | 57.335 | 1978 | 58.206 | 1977 | 59.072 | 1976 | 59.503 | 1975 | 59.67 | 1974 | 59.837 | 1973 | 60.003 | 1972 | 60.169 | 1971 | 60.335 | 1970 | 60.5 | 1969 | 60.666 | 1968 | 60.831 | 1967 | 60.996 | 1966 | 61.16 | 1965 | 62.357 | 1964 | 63.859 | 1963 | 65.338 | 1962 | 66.786 | 1961 | 68.203 | 1960 | 69.49 |
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