Year | Value | 2023 | 63.636 | 2022 | 64.128 | 2021 | 64.607 | 2020 | 65.074 | 2019 | 65.528 | 2018 | 65.97 | 2017 | 66.4 | 2016 | 66.818 | 2015 | 67.223 | 2014 | 67.616 | 2013 | 67.997 | 2012 | 68.366 | 2011 | 68.724 | 2010 | 69.07 | 2009 | 69.413 | 2008 | 69.754 | 2007 | 70.094 | 2006 | 70.431 | 2005 | 70.765 | 2004 | 71.097 | 2003 | 71.428 | 2002 | 71.756 | 2001 | 72.082 | 2000 | 72.333 | 1999 | 72.547 | 1998 | 72.76 | 1997 | 72.972 | 1996 | 73.183 | 1995 | 73.393 | 1994 | 73.601 | 1993 | 73.809 | 1992 | 74.016 | 1991 | 74.222 | 1990 | 74.453 | 1989 | 74.695 | 1988 | 74.937 | 1987 | 75.177 | 1986 | 75.415 | 1985 | 75.652 | 1984 | 75.887 | 1983 | 76.121 | 1982 | 76.353 | 1981 | 76.583 | 1980 | 76.902 | 1979 | 77.264 | 1978 | 77.621 | 1977 | 77.974 | 1976 | 78.323 | 1975 | 78.668 | 1974 | 79.009 |
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