Year | Value | 2022 | 74.767 | 2021 | 74.118 | 2020 | 73.444 | 2019 | 72.746 | 2018 | 72.023 | 2017 | 71.275 | 2016 | 70.501 | 2015 | 69.7 | 2014 | 68.874 | 2013 | 68.036 | 2012 | 67.187 | 2011 | 66.325 | 2010 | 65.452 | 2009 | 64.57 | 2008 | 63.678 | 2007 | 62.774 | 2006 | 62.187 | 2005 | 61.648 | 2004 | 61.107 | 2003 | 60.561 | 2002 | 60.014 | 2001 | 59.464 | 2000 | 58.912 | 1999 | 58.357 | 1998 | 57.8 | 1997 | 56.537 | 1996 | 55.268 | 1995 | 53.988 | 1994 | 52.704 | 1993 | 51.417 | 1992 | 50.315 | 1991 | 49.794 | 1990 | 49.274 | 1989 | 48.754 | 1988 | 48.234 | 1987 | 47.714 | 1986 | 47.195 | 1985 | 46.677 | 1984 | 46.16 | 1983 | 45.642 | 1982 | 45.127 | 1981 | 44.612 | 1980 | 44.099 | 1979 | 43.586 | 1978 | 43.075 | 1977 | 42.565 | 1976 | 42.058 | 1975 | 41.551 | 1974 | 41.046 | 1973 | 40.543 | 1972 | 40.043 | 1971 | 39.544 | 1970 | 39.439 | 1969 | 39.337 | 1968 | 39.236 | 1967 | 39.134 | 1966 | 39.033 | 1965 | 38.931 | 1964 | 38.83 | 1963 | 38.729 | 1962 | 38.628 | 1961 | 38.527 | 1960 | 38.354 |
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