Year | Value | 2021 | 78.673 | 2020 | 76.92 | 2019 | 79.685 | 2018 | 79.722 | 2017 | 79.781 | 2016 | 79.701 | 2015 | 79.562 | 2014 | 79.445 | 2013 | 79.164 | 2012 | 78.812 | 2011 | 78.464 | 2010 | 77.982 | 2009 | 77.442 | 2008 | 77.145 | 2007 | 77.017 | 2006 | 76.887 | 2005 | 76.903 | 2004 | 76.792 | 2003 | 76.985 | 2002 | 76.982 | 2001 | 76.891 | 2000 | 76.722 | 1999 | 76.416 | 1998 | 76.157 | 1997 | 75.879 | 1996 | 75.618 | 1995 | 75.537 | 1994 | 75.763 | 1993 | 75.794 | 1992 | 75.691 | 1991 | 74.216 | 1990 | 73.281 | 1989 | 74.826 | 1988 | 74.52 | 1987 | 74.11 | 1986 | 73.558 | 1985 | 73.074 | 1984 | 72.61 | 1983 | 72.02 | 1982 | 71.498 | 1981 | 71.081 | 1980 | 70.341 | 1979 | 69.677 | 1978 | 69.012 | 1977 | 68.585 | 1976 | 68.206 | 1975 | 67.892 | 1974 | 67.93 | 1973 | 67.578 | 1972 | 67.421 | 1971 | 67.058 | 1970 | 66.53 | 1969 | 65.677 | 1968 | 64.735 | 1967 | 63.986 | 1966 | 63.075 | 1965 | 62.219 | 1964 | 61.158 | 1963 | 60.162 | 1962 | 59.079 | 1961 | 58.015 | 1960 | 56.919 |
|