Year | Value | 2022 | 81.302 | 2021 | 80.994 | 2020 | 80.691 | 2019 | 80.393 | 2018 | 80.102 | 2017 | 79.817 | 2016 | 79.54 | 2015 | 79.27 | 2014 | 79.009 | 2013 | 78.756 | 2012 | 78.512 | 2011 | 78.277 | 2010 | 78.052 | 2009 | 77.837 | 2008 | 77.632 | 2007 | 77.437 | 2006 | 77.253 | 2005 | 77.08 | 2004 | 76.919 | 2003 | 76.768 | 2002 | 76.629 | 2001 | 76.502 | 2000 | 76.387 | 1999 | 76.284 | 1998 | 76.193 | 1997 | 76.114 | 1996 | 76.048 | 1995 | 75.994 | 1994 | 75.94 | 1993 | 75.886 | 1992 | 75.832 | 1991 | 75.777 | 1990 | 75.723 | 1989 | 75.669 | 1988 | 75.614 | 1987 | 75.56 | 1986 | 75.505 | 1985 | 75.45 | 1984 | 75.3 | 1983 | 74.055 | 1982 | 72.773 | 1981 | 71.451 | 1980 | 70.094 | 1979 | 68.696 | 1978 | 67.265 | 1977 | 65.802 | 1976 | 64.31 | 1975 | 62.785 | 1974 | 61.237 | 1973 | 59.528 | 1972 | 56.292 | 1971 | 52.992 | 1970 | 49.671 | 1969 | 46.352 | 1968 | 43.07 | 1967 | 39.839 | 1966 | 36.698 | 1965 | 33.666 | 1964 | 30.924 | 1963 | 29.998 | 1962 | 29.089 | 1961 | 28.197 | 1960 | 27.323 |
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