Year | Value | 2021 | 62.045 | 2020 | 63.862 | 2019 | 63.661 | 2018 | 63.594 | 2017 | 62.956 | 2016 | 62.416 | 2015 | 61.637 | 2014 | 60.844 | 2013 | 59.533 | 2012 | 57.723 | 2011 | 55.438 | 2010 | 52.24 | 2009 | 49.394 | 2008 | 47.774 | 2007 | 46.336 | 2006 | 46.394 | 2005 | 45.592 | 2004 | 45.49 | 2003 | 43.956 | 2002 | 45.792 | 2001 | 42.487 | 2000 | 46.476 | 1999 | 47.459 | 1998 | 49.311 | 1997 | 50.366 | 1996 | 51.245 | 1995 | 53.203 | 1994 | 55.288 | 1993 | 57.15 | 1992 | 59.28 | 1991 | 60.908 | 1990 | 62.539 | 1989 | 63.573 | 1988 | 64.339 | 1987 | 64.852 | 1986 | 64.897 | 1985 | 64.272 | 1984 | 63.456 | 1983 | 62.677 | 1982 | 62.193 | 1981 | 61.652 | 1980 | 60.783 | 1979 | 59.708 | 1978 | 59.497 | 1977 | 59.456 | 1976 | 59.486 | 1975 | 59.465 | 1974 | 59.474 | 1973 | 59.34 | 1972 | 59.17 | 1971 | 58.961 | 1970 | 58.766 | 1969 | 58.462 | 1968 | 58.344 | 1967 | 58.062 | 1966 | 57.827 | 1965 | 57.385 | 1964 | 56.914 | 1963 | 56.471 | 1962 | 56.016 | 1961 | 55.564 | 1960 | 55.245 |
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