Year | Value | 2021 | 64.307 | 2020 | 64.982 | 2019 | 64.922 | 2018 | 64.717 | 2017 | 64.019 | 2016 | 63.434 | 2015 | 63.094 | 2014 | 62.472 | 2013 | 61.684 | 2012 | 61.024 | 2011 | 59.869 | 2010 | 59.039 | 2009 | 57.967 | 2008 | 56.734 | 2007 | 55.815 | 2006 | 54.518 | 2005 | 53.634 | 2004 | 52.657 | 2003 | 51.674 | 2002 | 49.896 | 2001 | 49.606 | 2000 | 48.561 | 1999 | 48.478 | 1998 | 47.618 | 1997 | 48.279 | 1996 | 47.96 | 1995 | 47.829 | 1994 | 47.499 | 1993 | 46.578 | 1992 | 45.484 | 1991 | 46.807 | 1990 | 45.453 | 1989 | 45.33 | 1988 | 45.155 | 1987 | 44.724 | 1986 | 46.037 | 1985 | 45.912 | 1984 | 45.698 | 1983 | 45.435 | 1982 | 46.133 | 1981 | 45.864 | 1980 | 45.608 | 1979 | 45.361 | 1978 | 45.035 | 1977 | 44.68 | 1976 | 44.412 | 1975 | 44.353 | 1974 | 44.596 | 1973 | 44.22 | 1972 | 43.809 | 1971 | 43.5 | 1970 | 43.182 | 1969 | 42.8 | 1968 | 42.454 | 1967 | 42.019 | 1966 | 41.656 | 1965 | 41.384 | 1964 | 40.99 | 1963 | 40.665 | 1962 | 40.399 | 1961 | 40.097 | 1960 | 39.918 |
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