Year | Value | 2022 | 70.214 | 2021 | 69.888 | 2020 | 69.568 | 2019 | 69.254 | 2018 | 68.945 | 2017 | 68.642 | 2016 | 68.346 | 2015 | 68.056 | 2014 | 67.772 | 2013 | 67.495 | 2012 | 67.218 | 2011 | 66.938 | 2010 | 66.657 | 2009 | 66.376 | 2008 | 66.093 | 2007 | 65.809 | 2006 | 65.524 | 2005 | 65.237 | 2004 | 64.95 | 2003 | 64.585 | 2002 | 64.202 | 2001 | 63.818 | 2000 | 63.432 | 1999 | 63.043 | 1998 | 62.653 | 1997 | 62.262 | 1996 | 61.87 | 1995 | 61.474 | 1994 | 61.078 | 1993 | 60.362 | 1992 | 59.562 | 1991 | 58.756 | 1990 | 57.946 | 1989 | 57.131 | 1988 | 56.314 | 1987 | 55.491 | 1986 | 54.667 | 1985 | 53.839 | 1984 | 53.011 | 1983 | 52.356 | 1982 | 51.76 | 1981 | 51.164 | 1980 | 50.569 | 1979 | 49.972 | 1978 | 49.375 | 1977 | 48.779 | 1976 | 48.184 | 1975 | 47.588 | 1974 | 46.79 | 1973 | 45.959 | 1972 | 45.132 | 1971 | 44.305 | 1970 | 43.482 | 1969 | 42.662 | 1968 | 41.848 | 1967 | 41.036 | 1966 | 40.23 | 1965 | 39.724 | 1964 | 39.279 | 1963 | 38.833 | 1962 | 38.391 | 1961 | 37.95 | 1960 | 37.511 |
|