Year | Value | 2021 | 66.201 | 2020 | 66.408 | 2019 | 66.989 | 2018 | 66.535 | 2017 | 65.999 | 2016 | 65.386 | 2015 | 64.651 | 2014 | 63.873 | 2013 | 62.96 | 2012 | 62.03 | 2011 | 61.049 | 2010 | 60.105 | 2009 | 58.894 | 2008 | 58.086 | 2007 | 57.52 | 2006 | 56.911 | 2005 | 56.299 | 2004 | 55.596 | 2003 | 54.895 | 2002 | 53.863 | 2001 | 53.161 | 2000 | 52.362 | 1999 | 51.748 | 1998 | 50.914 | 1997 | 50.624 | 1996 | 50.744 | 1995 | 50.786 | 1994 | 50.797 | 1993 | 50.87 | 1992 | 50.989 | 1991 | 51.306 | 1990 | 51.485 | 1989 | 51.739 | 1988 | 51.843 | 1987 | 51.726 | 1986 | 51.672 | 1985 | 51.556 | 1984 | 51.546 | 1983 | 51.543 | 1982 | 51.528 | 1981 | 51.472 | 1980 | 51.201 | 1979 | 50.907 | 1978 | 50.321 | 1977 | 49.842 | 1976 | 49.236 | 1975 | 48.722 | 1974 | 48.306 | 1973 | 47.978 | 1972 | 47.324 | 1971 | 46.917 | 1970 | 46.45 | 1969 | 45.973 | 1968 | 45.366 | 1967 | 44.756 | 1966 | 44.381 | 1965 | 44.026 | 1964 | 43.747 | 1963 | 43.494 | 1962 | 43.285 | 1961 | 43.1 | 1960 | 42.937 |
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