Year | Value | 2021 | 77.023 | 2020 | 79.277 | 2019 | 79.427 | 2018 | 79.484 | 2017 | 79.377 | 2016 | 79.459 | 2015 | 79.086 | 2014 | 78.774 | 2013 | 79.403 | 2012 | 79.283 | 2011 | 79.348 | 2010 | 78.67 | 2009 | 78.672 | 2008 | 78.445 | 2007 | 78.462 | 2006 | 78.514 | 2005 | 78.505 | 2004 | 78.331 | 2003 | 78.072 | 2002 | 77.983 | 2001 | 77.545 | 2000 | 77.586 | 1999 | 77.138 | 1998 | 76.896 | 1997 | 77.07 | 1996 | 76.804 | 1995 | 76.552 | 1994 | 76.67 | 1993 | 76.703 | 1992 | 76.627 | 1991 | 76.591 | 1990 | 76.63 | 1989 | 76.263 | 1988 | 76.106 | 1987 | 75.741 | 1986 | 75.505 | 1985 | 75.111 | 1984 | 75.091 | 1983 | 75.079 | 1982 | 74.654 | 1981 | 73.799 | 1980 | 72.899 | 1979 | 72.423 | 1978 | 72.239 | 1977 | 71.288 | 1976 | 70.294 | 1975 | 69.4 | 1974 | 68.454 | 1973 | 67.953 | 1972 | 66.716 | 1971 | 66.301 | 1970 | 65.361 | 1969 | 65.016 | 1968 | 64.428 | 1967 | 63.921 | 1966 | 63.367 | 1965 | 62.663 | 1964 | 62.083 | 1963 | 61.624 | 1962 | 61.111 | 1961 | 60.901 | 1960 | 60.415 |
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