Year | Value | 2022 | 45.041 | 2021 | 44.617 | 2020 | 44.196 | 2019 | 43.777 | 2018 | 43.36 | 2017 | 42.945 | 2016 | 42.533 | 2015 | 42.123 | 2014 | 41.715 | 2013 | 41.31 | 2012 | 40.908 | 2011 | 40.508 | 2010 | 40.111 | 2009 | 39.716 | 2008 | 39.325 | 2007 | 38.934 | 2006 | 38.545 | 2005 | 38.157 | 2004 | 37.772 | 2003 | 37.387 | 2002 | 37.004 | 2001 | 36.622 | 2000 | 36.243 | 1999 | 35.865 | 1998 | 35.488 | 1997 | 35.114 | 1996 | 34.742 | 1995 | 34.371 | 1994 | 34.002 | 1993 | 33.635 | 1992 | 33.271 | 1991 | 32.39 | 1990 | 30.83 | 1989 | 29.312 | 1988 | 27.841 | 1987 | 26.413 | 1986 | 25.034 | 1985 | 23.704 | 1984 | 22.426 | 1983 | 21.194 | 1982 | 20.013 | 1981 | 18.883 | 1980 | 17.804 | 1979 | 16.77 | 1978 | 16.457 | 1977 | 16.287 | 1976 | 16.118 | 1975 | 15.95 | 1974 | 15.783 | 1973 | 15.618 | 1972 | 15.455 | 1971 | 15.293 | 1970 | 15.132 | 1969 | 14.972 | 1968 | 14.815 | 1967 | 14.658 | 1966 | 14.503 | 1965 | 14.349 | 1964 | 14.197 | 1963 | 14.045 | 1962 | 13.895 | 1961 | 13.747 | 1960 | 13.6 |
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