Year | Value | 2021 | 73.773 | 2020 | 73.536 | 2019 | 73.236 | 2018 | 72.914 | 2017 | 72.576 | 2016 | 72.317 | 2015 | 72.072 | 2014 | 71.798 | 2013 | 71.451 | 2012 | 71.091 | 2011 | 70.628 | 2010 | 70.092 | 2009 | 69.561 | 2008 | 69.199 | 2007 | 68.675 | 2006 | 68.099 | 2005 | 67.463 | 2004 | 66.917 | 2003 | 66.335 | 2002 | 65.703 | 2001 | 65.019 | 2000 | 63.577 | 1999 | 63.777 | 1998 | 63.092 | 1997 | 62.36 | 1996 | 61.687 | 1995 | 60.974 | 1994 | 60.047 | 1993 | 59.53 | 1992 | 58.82 | 1991 | 58.019 | 1990 | 57.324 | 1989 | 56.575 | 1988 | 55.784 | 1987 | 54.942 | 1986 | 54.119 | 1985 | 53.286 | 1984 | 52.552 | 1983 | 51.811 | 1982 | 51.041 | 1981 | 50.212 | 1980 | 49.383 | 1979 | 48.544 | 1978 | 47.686 | 1977 | 46.874 | 1976 | 45.979 | 1975 | 45.108 | 1974 | 44.284 | 1973 | 43.469 | 1972 | 42.576 | 1971 | 41.8 | 1970 | 41.008 | 1969 | 40.188 | 1968 | 39.328 | 1967 | 38.619 | 1966 | 37.908 | 1965 | 37.236 | 1964 | 36.606 | 1963 | 36.001 | 1962 | 35.424 | 1961 | 34.892 | 1960 | 34.414 |
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