Year | Value | 2022 | 61.704 | 2021 | 62.985 | 2020 | 66.606 | 2019 | 66.637 | 2018 | 66.176 | 2017 | 65.88 | 2016 | 65.201 | 2015 | 64.03 | 2014 | 63.049 | 2013 | 62.029 | 2012 | 60.85 | 2011 | 59.502 | 2010 | 58.731 | 2009 | 58.395 | 2008 | 57.422 | 2007 | 56.201 | 2006 | 54.873 | 2005 | 53.672 | 2004 | 53.12 | 2003 | 52.74 | 2002 | 53.036 | 2001 | 53.042 | 2000 | 53.98 | 1999 | 55.188 | 1998 | 56.238 | 1997 | 57.887 | 1996 | 59.216 | 1995 | 61.108 | 1994 | 62.353 | 1993 | 63.411 | 1992 | 64.208 | 1991 | 64.933 | 1990 | 65.45 | 1989 | 65.678 | 1988 | 64.796 | 1987 | 64.836 | 1986 | 64.334 | 1985 | 63.924 | 1984 | 63.496 | 1983 | 63.124 | 1982 | 62.987 | 1981 | 62.461 | 1980 | 62.02 | 1979 | 61.586 | 1978 | 61.072 | 1977 | 60.346 | 1976 | 59.623 | 1975 | 59.069 | 1974 | 58.194 |
|