Year | Value | 2022 | 65.503 | 2021 | 65.019 | 2020 | 65.461 | 2019 | 65.563 | 2018 | 65.583 | 2017 | 65.337 | 2016 | 64.52 | 2015 | 64.299 | 2014 | 64.091 | 2013 | 63.225 | 2012 | 63.083 | 2011 | 62.409 | 2010 | 62.267 | 2009 | 61.471 | 2008 | 61.26 | 2007 | 61.018 | 2006 | 60.419 | 2005 | 60.184 | 2004 | 59.26 | 2003 | 59.209 | 2002 | 58.683 | 2001 | 58.444 | 2000 | 58.047 | 1999 | 58.12 | 1998 | 57.681 | 1997 | 57.689 | 1996 | 57.936 | 1995 | 58.084 | 1994 | 57.392 | 1993 | 57.715 | 1992 | 57.896 | 1991 | 57.714 | 1990 | 57.518 | 1989 | 57.141 | 1988 | 57.058 | 1987 | 56.648 | 1986 | 56.487 | 1985 | 55.974 | 1984 | 55.656 | 1983 | 55.083 | 1982 | 54.664 | 1981 | 54.282 | 1980 | 53.944 | 1979 | 53.559 | 1978 | 53.1 | 1977 | 52.603 | 1976 | 52.039 | 1975 | 51.819 | 1974 | 51.569 |
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