Year | Value | 2022 | 63.852 | 2021 | 63.222 | 2020 | 62.582 | 2019 | 61.931 | 2018 | 61.27 | 2017 | 60.599 | 2016 | 59.918 | 2015 | 59.228 | 2014 | 58.528 | 2013 | 57.82 | 2012 | 57.105 | 2011 | 56.384 | 2010 | 55.662 | 2009 | 54.937 | 2008 | 54.211 | 2007 | 53.481 | 2006 | 52.751 | 2005 | 52.02 | 2004 | 51.288 | 2003 | 50.555 | 2002 | 49.683 | 2001 | 48.775 | 2000 | 47.868 | 1999 | 46.961 | 1998 | 46.057 | 1997 | 45.155 | 1996 | 44.258 | 1995 | 43.362 | 1994 | 42.472 | 1993 | 41.586 | 1992 | 40.52 | 1991 | 39.41 | 1990 | 38.312 | 1989 | 37.226 | 1988 | 36.155 | 1987 | 35.094 | 1986 | 34.049 | 1985 | 33.019 | 1984 | 32.007 | 1983 | 31.008 | 1982 | 30.113 | 1981 | 29.256 | 1980 | 28.414 | 1979 | 27.585 | 1978 | 26.772 | 1977 | 25.974 | 1976 | 25.193 | 1975 | 24.426 | 1974 | 23.675 | 1973 | 22.941 | 1972 | 21.814 | 1971 | 20.63 | 1970 | 19.496 | 1969 | 18.41 | 1968 | 17.373 | 1967 | 16.379 | 1966 | 15.433 | 1965 | 14.533 | 1964 | 13.677 | 1963 | 12.862 | 1962 | 12.535 | 1961 | 12.331 | 1960 | 12.129 |
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