Year | Value | 2022 | 43.921 | 2021 | 43.358 | 2020 | 42.8 | 2019 | 42.248 | 2018 | 41.702 | 2017 | 41.162 | 2016 | 40.628 | 2015 | 40.1 | 2014 | 39.579 | 2013 | 39.061 | 2012 | 38.546 | 2011 | 38.032 | 2010 | 37.533 | 2009 | 37.058 | 2008 | 36.587 | 2007 | 36.116 | 2006 | 35.649 | 2005 | 35.185 | 2004 | 34.724 | 2003 | 34.265 | 2002 | 33.809 | 2001 | 33.356 | 2000 | 32.907 | 1999 | 32.46 | 1998 | 32.016 | 1997 | 31.576 | 1996 | 31.139 | 1995 | 30.705 | 1994 | 30.275 | 1993 | 29.848 | 1992 | 29.425 | 1991 | 29.005 | 1990 | 28.589 | 1989 | 28.176 | 1988 | 27.768 | 1987 | 27.362 | 1986 | 26.96 | 1985 | 26.562 | 1984 | 26.169 | 1983 | 25.778 | 1982 | 25.391 | 1981 | 25.02 | 1980 | 24.663 | 1979 | 24.308 | 1978 | 23.958 | 1977 | 23.611 | 1976 | 23.268 | 1975 | 22.927 | 1974 | 22.591 | 1973 | 22.258 | 1972 | 21.929 | 1971 | 21.602 | 1970 | 21.28 | 1969 | 20.098 | 1968 | 18.7 | 1967 | 17.374 | 1966 | 16.125 | 1965 | 14.95 | 1964 | 13.847 | 1963 | 12.811 | 1962 | 11.844 | 1961 | 10.94 | 1960 | 10.098 |
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