Year | Value | 2022 | 70.136 | 2021 | 70.387 | 2020 | 70.62 | 2019 | 70.836 | 2018 | 71.035 | 2017 | 71.216 | 2016 | 71.381 | 2015 | 71.53 | 2014 | 71.662 | 2013 | 71.777 | 2012 | 71.877 | 2011 | 71.96 | 2010 | 72.027 | 2009 | 72.079 | 2008 | 72.114 | 2007 | 72.133 | 2006 | 72.137 | 2005 | 72.125 | 2004 | 72.097 | 2003 | 72.053 | 2002 | 72.008 | 2001 | 71.964 | 2000 | 71.92 | 1999 | 71.876 | 1998 | 71.832 | 1997 | 71.787 | 1996 | 71.743 | 1995 | 71.699 | 1994 | 71.654 | 1993 | 71.61 | 1992 | 71.565 | 1991 | 71.634 | 1990 | 72.131 | 1989 | 72.622 | 1988 | 73.107 | 1987 | 73.587 | 1986 | 74.062 | 1985 | 74.531 | 1984 | 74.994 | 1983 | 75.452 | 1982 | 75.905 | 1981 | 76.351 | 1980 | 76.785 | 1979 | 77.19 | 1978 | 77.59 | 1977 | 77.986 | 1976 | 78.375 | 1975 | 78.761 | 1974 | 79.141 | 1973 | 79.516 | 1972 | 79.885 | 1971 | 80.25 | 1970 | 80.61 | 1969 | 80.965 | 1968 | 81.315 | 1967 | 81.66 | 1966 | 82 | 1965 | 83.022 | 1964 | 83.996 | 1963 | 84.926 | 1962 | 85.811 | 1961 | 86.652 | 1960 | 87.449 |
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