Year | Value | 2021 | 69.001 | 2020 | 69.959 | 2019 | 69.799 | 2018 | 69.676 | 2017 | 68.995 | 2016 | 68.838 | 2015 | 68.744 | 2014 | 68.168 | 2013 | 67.873 | 2012 | 67.182 | 2011 | 66.963 | 2010 | 66.215 | 2009 | 66.118 | 2008 | 57.787 | 2007 | 65.301 | 2006 | 64.781 | 2005 | 64.761 | 2004 | 64.368 | 2003 | 64.306 | 2002 | 63.918 | 2001 | 63.748 | 2000 | 63.338 | 1999 | 63.202 | 1998 | 63.123 | 1997 | 62.44 | 1996 | 62.029 | 1995 | 61.142 | 1994 | 60.811 | 1993 | 60.413 | 1992 | 59.823 | 1991 | 59.639 | 1990 | 59.176 | 1989 | 59.115 | 1988 | 58.625 | 1987 | 58.566 | 1986 | 58.477 | 1985 | 58.028 | 1984 | 57.993 | 1983 | 57.597 | 1982 | 57.416 | 1981 | 56.919 | 1980 | 56.787 | 1979 | 56.328 | 1978 | 55.761 | 1977 | 55.654 | 1976 | 55.256 | 1975 | 54.657 | 1974 | 54.533 | 1973 | 54.171 | 1972 | 53.582 | 1971 | 53.435 | 1970 | 52.91 | 1969 | 52.52 | 1968 | 52.31 | 1967 | 51.308 | 1966 | 50.273 | 1965 | 49.432 | 1964 | 48.332 | 1963 | 47.322 | 1962 | 46.698 | 1961 | 46.053 | 1960 | 45.481 |
|