Year | Value | 2022 | 69.141 | 2021 | 68.775 | 2020 | 68.414 | 2019 | 68.059 | 2018 | 67.709 | 2017 | 67.365 | 2016 | 67.027 | 2015 | 66.696 | 2014 | 66.371 | 2013 | 66.052 | 2012 | 65.741 | 2011 | 65.437 | 2010 | 65.14 | 2009 | 64.851 | 2008 | 64.56 | 2007 | 64.268 | 2006 | 63.976 | 2005 | 63.682 | 2004 | 63.387 | 2003 | 63.091 | 2002 | 62.794 | 2001 | 62.497 | 2000 | 62.198 | 1999 | 61.451 | 1998 | 60.632 | 1997 | 59.807 | 1996 | 58.978 | 1995 | 58.141 | 1994 | 57.301 | 1993 | 56.456 | 1992 | 55.609 | 1991 | 54.757 | 1990 | 53.903 | 1989 | 53.497 | 1988 | 53.159 | 1987 | 52.82 | 1986 | 52.482 | 1985 | 52.143 | 1984 | 51.805 | 1983 | 51.465 | 1982 | 51.126 | 1981 | 50.786 | 1980 | 50.447 | 1979 | 50.159 | 1978 | 49.879 | 1977 | 49.598 | 1976 | 49.319 | 1975 | 49.038 | 1974 | 48.759 | 1973 | 48.479 | 1972 | 48.199 | 1971 | 47.919 | 1970 | 47.64 | 1969 | 47.038 | 1968 | 46.385 | 1967 | 45.732 | 1966 | 45.08 | 1965 | 44.431 | 1964 | 43.784 | 1963 | 43.137 | 1962 | 42.494 | 1961 | 41.853 | 1960 | 41.249 |
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