Year | Value | 2022 | 66.911 | 2021 | 66.856 | 2020 | 66.821 | 2019 | 66.805 | 2018 | 66.81 | 2017 | 66.836 | 2016 | 66.881 | 2015 | 66.946 | 2014 | 67.031 | 2013 | 67.137 | 2012 | 67.261 | 2011 | 67.406 | 2010 | 67.551 | 2009 | 67.695 | 2008 | 67.839 | 2007 | 67.982 | 2006 | 68.125 | 2005 | 68.268 | 2004 | 68.41 | 2003 | 68.553 | 2002 | 68.694 | 2001 | 68.769 | 2000 | 68.648 | 1999 | 68.527 | 1998 | 68.405 | 1997 | 68.283 | 1996 | 68.161 | 1995 | 68.038 | 1994 | 67.915 | 1993 | 67.792 | 1992 | 67.598 | 1991 | 67.188 | 1990 | 66.776 | 1989 | 66.361 | 1988 | 65.945 | 1987 | 65.524 | 1986 | 65.102 | 1985 | 64.678 | 1984 | 64.252 | 1983 | 63.822 | 1982 | 62.964 | 1981 | 60.809 | 1980 | 58.614 | 1979 | 56.378 | 1978 | 54.119 | 1977 | 51.843 | 1976 | 49.563 | 1975 | 47.277 | 1974 | 45.007 | 1973 | 42.757 | 1972 | 41.807 | 1971 | 41.283 | 1970 | 40.761 | 1969 | 40.242 | 1968 | 39.726 | 1967 | 39.21 | 1966 | 38.698 | 1965 | 38.188 | 1964 | 37.681 | 1963 | 37.176 | 1962 | 36.674 | 1961 | 36.175 | 1960 | 35.628 |
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