Year | Value | 2021 | 59.269 | 2020 | 62.829 | 2019 | 63.075 | 2018 | 62.586 | 2017 | 62.293 | 2016 | 61.682 | 2015 | 60.7 | 2014 | 59.822 | 2013 | 58.694 | 2012 | 57.64 | 2011 | 56.553 | 2010 | 56.015 | 2009 | 55.496 | 2008 | 54.653 | 2007 | 53.68 | 2006 | 52.655 | 2005 | 51.787 | 2004 | 51.246 | 2003 | 51.083 | 2002 | 51.254 | 2001 | 51.26 | 2000 | 51.99 | 1999 | 53.036 | 1998 | 54.101 | 1997 | 55.558 | 1996 | 56.918 | 1995 | 58.634 | 1994 | 59.846 | 1993 | 60.86 | 1992 | 61.545 | 1991 | 62.098 | 1990 | 62.496 | 1989 | 62.642 | 1988 | 60.248 | 1987 | 60.207 | 1986 | 59.555 | 1985 | 59.041 | 1984 | 58.512 | 1983 | 57.969 | 1982 | 57.644 | 1981 | 57.123 | 1980 | 56.775 | 1979 | 58.439 | 1978 | 58.085 | 1977 | 57.553 | 1976 | 57.015 | 1975 | 56.547 | 1974 | 55.893 | 1973 | 55.374 | 1972 | 54.781 | 1971 | 54.237 | 1970 | 53.63 | 1969 | 53.117 | 1968 | 52.601 | 1967 | 52.035 | 1966 | 51.439 | 1965 | 51.039 | 1964 | 50.434 | 1963 | 49.714 | 1962 | 49.087 | 1961 | 48.374 | 1960 | 47.679 |
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