Year | Value | 2021 | 60.629 | 2020 | 61.636 | 2019 | 61.807 | 2018 | 60.901 | 2017 | 63.108 | 2016 | 63.32 | 2015 | 63.005 | 2014 | 65.334 | 2013 | 65.557 | 2012 | 65.275 | 2011 | 65.348 | 2010 | 65.165 | 2009 | 65.076 | 2008 | 65.037 | 2007 | 64.535 | 2006 | 63.939 | 2005 | 63.65 | 2004 | 63.138 | 2003 | 62.556 | 2002 | 61.946 | 2001 | 61.27 | 2000 | 60.619 | 1999 | 60.024 | 1998 | 59.46 | 1997 | 59.23 | 1996 | 58.693 | 1995 | 58.593 | 1994 | 57.571 | 1993 | 58.001 | 1992 | 57.523 | 1991 | 57.04 | 1990 | 56.811 | 1989 | 56.283 | 1988 | 55.752 | 1987 | 55.12 | 1986 | 49.847 | 1985 | 53.674 | 1984 | 52.788 | 1983 | 51.748 | 1982 | 50.389 | 1981 | 49.562 | 1980 | 48.48 | 1979 | 47.197 | 1978 | 46.255 | 1977 | 45.105 | 1976 | 43.916 | 1975 | 43.013 | 1974 | 42.077 | 1973 | 41.069 | 1972 | 40.124 | 1971 | 39.262 | 1970 | 38.012 | 1969 | 36.969 | 1968 | 35.128 | 1967 | 34.127 | 1966 | 33.416 | 1965 | 32.767 | 1964 | 32.101 | 1963 | 30.351 | 1962 | 30.876 | 1961 | 31.69 | 1960 | 31.349 |
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