Year | Value | 2021 | 66.119 | 2020 | 67.118 | 2019 | 67.329 | 2018 | 66.919 | 2017 | 66.732 | 2016 | 66.235 | 2015 | 65.954 | 2014 | 65.684 | 2013 | 65.211 | 2012 | 64.804 | 2011 | 64.126 | 2010 | 46.251 | 2009 | 64.113 | 2008 | 63.696 | 2007 | 63.419 | 2006 | 63.06 | 2005 | 62.609 | 2004 | 60.246 | 2003 | 61.463 | 2002 | 60.701 | 2001 | 60.268 | 2000 | 60.121 | 1999 | 59.64 | 1998 | 58.691 | 1997 | 57.986 | 1996 | 57.638 | 1995 | 56.93 | 1994 | 55.897 | 1993 | 55.663 | 1992 | 55.163 | 1991 | 54.792 | 1990 | 54.085 | 1989 | 53.98 | 1988 | 53.853 | 1987 | 53.457 | 1986 | 53.185 | 1985 | 52.717 | 1984 | 52.173 | 1983 | 51.985 | 1982 | 51.722 | 1981 | 51.477 | 1980 | 51.116 | 1979 | 51.068 | 1978 | 50.936 | 1977 | 50.734 | 1976 | 50.498 | 1975 | 50.315 | 1974 | 50.066 | 1973 | 49.921 | 1972 | 49.685 | 1971 | 49.519 | 1970 | 49.123 | 1969 | 48.749 | 1968 | 48.393 | 1967 | 48.039 | 1966 | 47.531 | 1965 | 47.343 | 1964 | 46.978 | 1963 | 44.449 | 1962 | 46.434 | 1961 | 46.072 | 1960 | 45.697 |
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