Year | Value | 2022 | 58.229 | 2021 | 57.74 | 2020 | 57.247 | 2019 | 56.75 | 2018 | 56.248 | 2017 | 55.742 | 2016 | 55.235 | 2015 | 54.726 | 2014 | 54.216 | 2013 | 53.706 | 2012 | 53.196 | 2011 | 52.683 | 2010 | 52.171 | 2009 | 51.658 | 2008 | 51.146 | 2007 | 50.657 | 2006 | 50.264 | 2005 | 49.871 | 2004 | 49.479 | 2003 | 49.085 | 2002 | 48.692 | 2001 | 48.3 | 2000 | 47.908 | 1999 | 47.515 | 1998 | 47.123 | 1997 | 46.732 | 1996 | 46.282 | 1995 | 45.496 | 1994 | 44.713 | 1993 | 43.933 | 1992 | 43.156 | 1991 | 42.381 | 1990 | 41.611 | 1989 | 40.845 | 1988 | 40.085 | 1987 | 39.327 | 1986 | 38.675 | 1985 | 38.523 | 1984 | 38.372 | 1983 | 38.221 | 1982 | 38.07 | 1981 | 37.919 | 1980 | 37.769 | 1979 | 37.619 | 1978 | 37.469 | 1977 | 37.319 | 1976 | 37.119 | 1975 | 36.721 | 1974 | 36.324 | 1973 | 35.93 | 1972 | 35.538 | 1971 | 35.147 | 1970 | 34.758 | 1969 | 34.371 | 1968 | 33.987 | 1967 | 33.604 | 1966 | 33.18 | 1965 | 32.582 | 1964 | 31.991 | 1963 | 31.403 | 1962 | 30.823 | 1961 | 30.248 | 1960 | 29.681 |
|