Year | Value | 2022 | 63.525 | 2021 | 65.16 | 2020 | 66.39 | 2019 | 66.92 | 2018 | 66.69 | 2017 | 67.02 | 2016 | 66.73 | 2015 | 66.37 | 2014 | 66.25 | 2013 | 66.34 | 2012 | 66.11 | 2011 | 65.98 | 2010 | 65.28 | 2009 | 63.79 | 2008 | 62.51 | 2007 | 62.51 | 2006 | 62.38 | 2005 | 62.23 | 2004 | 62.6 | 2003 | 62.64 | 2002 | 62.7 | 2001 | 62.32 | 2000 | 62.1 | 1999 | 62.62 | 1998 | 63.17 | 1997 | 62.23 | 1996 | 61.52 | 1995 | 61.22 | 1994 | 62.39 | 1993 | 63.16 | 1992 | 63.81 | 1991 | 64.62 | 1990 | 65.6 | 1989 | 66.1 | 1988 | 66.4 | 1987 | 66.3 | 1986 | 65.858 | 1985 | 64.078 | 1984 | 63.658 | 1983 | 64.022 | 1982 | 63.963 | 1981 | 63.766 | 1980 | 63.537 | 1979 | 63.757 | 1978 | 64.119 | 1977 | 64.281 | 1976 | 64.737 | 1975 | 64.699 | 1974 | 64.895 |
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