Year | Value | 2022 | 45.761 | 2021 | 45.192 | 2020 | 44.629 | 2019 | 44.072 | 2018 | 43.521 | 2017 | 42.976 | 2016 | 42.438 | 2015 | 41.907 | 2014 | 41.382 | 2013 | 40.865 | 2012 | 40.354 | 2011 | 39.851 | 2010 | 39.355 | 2009 | 38.861 | 2008 | 38.371 | 2007 | 37.881 | 2006 | 37.395 | 2005 | 36.911 | 2004 | 36.43 | 2003 | 35.951 | 2002 | 35.475 | 2001 | 35.002 | 2000 | 34.802 | 1999 | 35.258 | 1998 | 35.716 | 1997 | 36.176 | 1996 | 36.638 | 1995 | 37.104 | 1994 | 37.572 | 1993 | 38.042 | 1992 | 38.514 | 1991 | 38.989 | 1990 | 39.407 | 1989 | 39.456 | 1988 | 39.506 | 1987 | 39.556 | 1986 | 39.606 | 1985 | 39.655 | 1984 | 39.705 | 1983 | 39.755 | 1982 | 39.805 | 1981 | 39.854 | 1980 | 39.815 | 1979 | 38.818 | 1978 | 37.832 | 1977 | 36.855 | 1976 | 35.89 | 1975 | 34.934 | 1974 | 33.992 | 1973 | 33.061 | 1972 | 32.146 | 1971 | 31.241 | 1970 | 30.351 | 1969 | 29.37 | 1968 | 27.791 | 1967 | 26.261 | 1966 | 24.789 | 1965 | 23.372 | 1964 | 22.015 | 1963 | 20.712 | 1962 | 19.785 | 1961 | 18.951 | 1960 | 18.145 |
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