Year | Value | 2022 | 5.953 | 2021 | 6.166 | 2020 | 6.395 | 2019 | 6.64 | 2018 | 6.902 | 2017 | 7.183 | 2016 | 7.483 | 2015 | 7.805 | 2014 | 8.149 | 2013 | 8.517 | 2012 | 8.91 | 2011 | 9.332 | 2010 | 9.772 | 2009 | 10.23 | 2008 | 10.706 | 2007 | 11.203 | 2006 | 11.719 | 2005 | 12.255 | 2004 | 12.812 | 2003 | 13.392 | 2002 | 13.993 | 2001 | 14.638 | 2000 | 15.45 | 1999 | 16.3 | 1998 | 17.186 | 1997 | 18.11 | 1996 | 19.07 | 1995 | 20.072 | 1994 | 21.112 | 1993 | 22.19 | 1992 | 23.306 | 1991 | 24.463 | 1990 | 25.657 | 1989 | 27.284 | 1988 | 29.01 | 1987 | 30.803 | 1986 | 32.655 | 1985 | 34.561 | 1984 | 36.516 | 1983 | 38.522 | 1982 | 40.565 | 1981 | 42.642 | 1980 | 44.741 | 1979 | 45.368 | 1978 | 45.76 | 1977 | 46.152 | 1976 | 46.544 | 1975 | 46.937 | 1974 | 47.331 | 1973 | 47.725 | 1972 | 48.118 | 1971 | 48.513 | 1970 | 48.894 | 1969 | 49.237 | 1968 | 49.58 | 1967 | 49.923 | 1966 | 50.266 | 1965 | 50.608 | 1964 | 50.951 | 1963 | 51.294 | 1962 | 51.636 | 1961 | 51.979 | 1960 | 52.321 |
|