Year | Value | 2022 | 50.669 | 2021 | 51.08 | 2020 | 51.485 | 2019 | 51.884 | 2018 | 52.277 | 2017 | 52.663 | 2016 | 53.043 | 2015 | 53.417 | 2014 | 53.784 | 2013 | 54.144 | 2012 | 54.498 | 2011 | 54.846 | 2010 | 55.186 | 2009 | 55.521 | 2008 | 55.848 | 2007 | 56.169 | 2006 | 56.483 | 2005 | 56.79 | 2004 | 57.091 | 2003 | 57.385 | 2002 | 57.672 | 2001 | 57.952 | 2000 | 58.226 | 1999 | 58.5 | 1998 | 58.772 | 1997 | 59.045 | 1996 | 59.316 | 1995 | 59.587 | 1994 | 59.858 | 1993 | 60.128 | 1992 | 60.397 | 1991 | 60.666 | 1990 | 62.186 | 1989 | 63.877 | 1988 | 65.532 | 1987 | 67.154 | 1986 | 68.734 | 1985 | 70.272 | 1984 | 71.763 | 1983 | 73.212 | 1982 | 74.611 | 1981 | 75.961 | 1980 | 77.259 | 1979 | 78.008 | 1978 | 78.66 | 1977 | 79.297 | 1976 | 79.919 | 1975 | 80.53 | 1974 | 81.125 | 1973 | 81.706 | 1972 | 82.272 | 1971 | 82.826 | 1970 | 83.365 | 1969 | 83.865 | 1968 | 84.343 | 1967 | 84.812 | 1966 | 85.268 | 1965 | 85.713 | 1964 | 86.146 | 1963 | 86.57 | 1962 | 86.981 | 1961 | 87.382 | 1960 | 87.772 |
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