Year | Value | 2021 | 60.399 | 2020 | 61.131 | 2019 | 61.314 | 2018 | 61.231 | 2017 | 61.087 | 2016 | 60.661 | 2015 | 60.617 | 2014 | 60.387 | 2013 | 60.086 | 2012 | 59.857 | 2011 | 59.202 | 2010 | 45.758 | 2009 | 59.429 | 2008 | 59.029 | 2007 | 58.842 | 2006 | 58.521 | 2005 | 58.265 | 2004 | 56.715 | 2003 | 57.57 | 2002 | 57.019 | 2001 | 56.713 | 2000 | 56.608 | 1999 | 56.272 | 1998 | 55.562 | 1997 | 55.023 | 1996 | 54.647 | 1995 | 54.133 | 1994 | 53.37 | 1993 | 53.002 | 1992 | 52.489 | 1991 | 51.966 | 1990 | 51.827 | 1989 | 51.489 | 1988 | 51.365 | 1987 | 50.97 | 1986 | 50.515 | 1985 | 50.272 | 1984 | 50.009 | 1983 | 49.692 | 1982 | 49.316 | 1981 | 48.994 | 1980 | 48.621 | 1979 | 48.22 | 1978 | 47.862 | 1977 | 47.624 | 1976 | 47.353 | 1975 | 46.992 | 1974 | 46.715 | 1973 | 46.441 | 1972 | 46.151 | 1971 | 45.869 | 1970 | 45.5 | 1969 | 45.034 | 1968 | 44.589 | 1967 | 44.171 | 1966 | 43.622 | 1965 | 43.329 | 1964 | 42.932 | 1963 | 41.049 | 1962 | 42.134 | 1961 | 41.747 | 1960 | 41.299 |
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