Year | Value | 2022 | 57.058 | 2021 | 56.335 | 2020 | 55.594 | 2019 | 54.835 | 2018 | 54.057 | 2017 | 53.262 | 2016 | 52.45 | 2015 | 51.619 | 2014 | 50.773 | 2013 | 49.927 | 2012 | 49.082 | 2011 | 48.235 | 2010 | 47.39 | 2009 | 46.547 | 2008 | 45.706 | 2007 | 44.866 | 2006 | 44.03 | 2005 | 43.551 | 2004 | 43.532 | 2003 | 43.512 | 2002 | 43.492 | 2001 | 43.473 | 2000 | 42.958 | 1999 | 41.54 | 1998 | 40.138 | 1997 | 38.752 | 1996 | 37.386 | 1995 | 36.409 | 1994 | 36.123 | 1993 | 35.839 | 1992 | 35.555 | 1991 | 35.272 | 1990 | 34.987 | 1989 | 34.695 | 1988 | 34.405 | 1987 | 34.116 | 1986 | 33.828 | 1985 | 33.541 | 1984 | 33.284 | 1983 | 33.032 | 1982 | 32.782 | 1981 | 32.532 | 1980 | 32.284 | 1979 | 32.036 | 1978 | 31.596 | 1977 | 30.925 | 1976 | 30.262 | 1975 | 29.606 | 1974 | 28.96 | 1973 | 27.997 | 1972 | 26.654 | 1971 | 25.348 | 1970 | 24.088 | 1969 | 22.871 | 1968 | 21.863 | 1967 | 21.097 | 1966 | 20.351 | 1965 | 19.625 | 1964 | 18.92 | 1963 | 18.233 | 1962 | 17.566 | 1961 | 16.918 | 1960 | 16.29 |
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