Year | Value | 2021 | 61.245 | 2020 | 61.975 | 2019 | 62.009 | 2018 | 61.808 | 2017 | 61.455 | 2016 | 61.288 | 2015 | 60.811 | 2014 | 60.633 | 2013 | 60.227 | 2012 | 60.011 | 2011 | 59.56 | 2010 | 59.324 | 2009 | 58.943 | 2008 | 58.799 | 2007 | 58.333 | 2006 | 58.217 | 2005 | 57.895 | 2004 | 57.804 | 2003 | 57.758 | 2002 | 57.579 | 2001 | 57.69 | 2000 | 57.309 | 1999 | 57.267 | 1998 | 56.898 | 1997 | 56.76 | 1996 | 57.123 | 1995 | 56.819 | 1994 | 56.639 | 1993 | 56.205 | 1992 | 55.807 | 1991 | 55.362 | 1990 | 54.962 | 1989 | 54.124 | 1988 | 53.947 | 1987 | 53.28 | 1986 | 52.803 | 1985 | 52.219 | 1984 | 51.612 | 1983 | 50.942 | 1982 | 50.479 | 1981 | 49.807 | 1980 | 49.248 | 1979 | 48.623 | 1978 | 47.953 | 1977 | 47.343 | 1976 | 46.762 | 1975 | 44.909 | 1974 | 45.683 | 1973 | 45.05 | 1972 | 44.48 | 1971 | 43.915 | 1970 | 43.394 | 1969 | 42.935 | 1968 | 42.519 | 1967 | 42.104 | 1966 | 41.733 | 1965 | 41.428 | 1964 | 40.917 | 1963 | 40.513 | 1962 | 40.225 | 1961 | 39.74 | 1960 | 39.345 |
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