Year | Value | 2022 | 57.934 | 2021 | 57.29 | 2020 | 56.641 | 2019 | 55.985 | 2018 | 55.325 | 2017 | 54.659 | 2016 | 53.989 | 2015 | 53.313 | 2014 | 52.635 | 2013 | 51.955 | 2012 | 51.276 | 2011 | 50.595 | 2010 | 49.914 | 2009 | 49.134 | 2008 | 48.335 | 2007 | 47.535 | 2006 | 46.738 | 2005 | 45.942 | 2004 | 45.149 | 2003 | 44.356 | 2002 | 43.568 | 2001 | 42.783 | 2000 | 42.002 | 1999 | 40.792 | 1998 | 39.593 | 1997 | 38.406 | 1996 | 37.235 | 1995 | 36.076 | 1994 | 34.933 | 1993 | 33.808 | 1992 | 32.703 | 1991 | 31.613 | 1990 | 30.584 | 1989 | 29.651 | 1988 | 28.736 | 1987 | 27.835 | 1986 | 26.953 | 1985 | 26.089 | 1984 | 25.244 | 1983 | 24.415 | 1982 | 23.606 | 1981 | 22.815 | 1980 | 22.104 | 1979 | 21.524 | 1978 | 20.956 | 1977 | 20.398 | 1976 | 19.853 | 1975 | 19.317 | 1974 | 18.793 | 1973 | 18.28 | 1972 | 17.779 | 1971 | 17.338 | 1970 | 17.071 | 1969 | 16.809 | 1968 | 16.549 | 1967 | 16.293 | 1966 | 16.039 | 1965 | 15.789 | 1964 | 15.543 | 1963 | 15.299 | 1962 | 15.058 | 1961 | 14.821 | 1960 | 14.586 |
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