Year | Value | 2022 | 62.916 | 2021 | 62.642 | 2020 | 62.381 | 2019 | 62.134 | 2018 | 61.899 | 2017 | 61.678 | 2016 | 61.471 | 2015 | 61.277 | 2014 | 61.098 | 2013 | 60.918 | 2012 | 60.738 | 2011 | 60.557 | 2010 | 60.377 | 2009 | 60.195 | 2008 | 60.04 | 2007 | 59.962 | 2006 | 59.884 | 2005 | 59.805 | 2004 | 59.727 | 2003 | 59.648 | 2002 | 59.57 | 2001 | 59.491 | 2000 | 59.412 | 1999 | 59.334 | 1998 | 59.255 | 1997 | 59.176 | 1996 | 59.097 | 1995 | 59.018 | 1994 | 58.939 | 1993 | 58.826 | 1992 | 58.679 | 1991 | 58.531 | 1990 | 58.384 | 1989 | 58.236 | 1988 | 58.088 | 1987 | 57.94 | 1986 | 57.792 | 1985 | 57.644 | 1984 | 57.495 | 1983 | 57.346 | 1982 | 57.198 | 1981 | 57.049 | 1980 | 56.9 | 1979 | 56.86 | 1978 | 56.82 | 1977 | 56.78 | 1976 | 56.74 | 1975 | 56.7 | 1974 | 56.202 | 1973 | 55.703 | 1972 | 55.204 | 1971 | 54.702 | 1970 | 54.2 | 1969 | 51.609 | 1968 | 49.012 | 1967 | 47.081 | 1966 | 46.084 | 1965 | 45.091 | 1964 | 44.102 | 1963 | 43.116 | 1962 | 42.136 | 1961 | 41.162 | 1960 | 40.195 |
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