Year | Value | 2021 | 65.161 | 2020 | 65.16 | 2019 | 65.831 | 2018 | 65.653 | 2017 | 65.532 | 2016 | 64.93 | 2015 | 64.649 | 2014 | 64.119 | 2013 | 63.864 | 2012 | 63.146 | 2011 | 62.699 | 2010 | 62.86 | 2009 | 62.645 | 2008 | 62.79 | 2007 | 62.557 | 2006 | 62.051 | 2005 | 61.463 | 2004 | 61.62 | 2003 | 61.34 | 2002 | 60.838 | 2001 | 60.362 | 2000 | 59.931 | 1999 | 59.46 | 1998 | 59.069 | 1997 | 59.127 | 1996 | 58.991 | 1995 | 58.904 | 1994 | 58.876 | 1993 | 58.954 | 1992 | 59.168 | 1991 | 59.392 | 1990 | 59.506 | 1989 | 58.383 | 1988 | 59.597 | 1987 | 59.443 | 1986 | 56.163 | 1985 | 58.385 | 1984 | 57.521 | 1983 | 57.625 | 1982 | 57.867 | 1981 | 57.94 | 1980 | 58.309 | 1979 | 58.385 | 1978 | 57.71 | 1977 | 57.156 | 1976 | 56.831 | 1975 | 56.516 | 1974 | 56.1 | 1973 | 55.781 | 1972 | 55.127 | 1971 | 54.397 | 1970 | 54.341 | 1969 | 53.229 | 1968 | 53.202 | 1967 | 52.496 | 1966 | 49.886 | 1965 | 47.847 | 1964 | 46.355 | 1963 | 45.026 | 1962 | 44.141 | 1961 | 42.835 | 1960 | 41.648 |
|