Year | Value | 2022 | 36.682 | 2021 | 35.954 | 2020 | 35.227 | 2019 | 34.5 | 2018 | 33.776 | 2017 | 33.053 | 2016 | 32.333 | 2015 | 31.617 | 2014 | 30.904 | 2013 | 30.196 | 2012 | 29.493 | 2011 | 28.798 | 2010 | 28.114 | 2009 | 27.439 | 2008 | 26.776 | 2007 | 26.121 | 2006 | 25.478 | 2005 | 24.845 | 2004 | 24.223 | 2003 | 23.611 | 2002 | 23.044 | 2001 | 22.674 | 2000 | 22.309 | 1999 | 21.947 | 1998 | 21.59 | 1997 | 21.237 | 1996 | 20.888 | 1995 | 20.543 | 1994 | 20.203 | 1993 | 19.867 | 1992 | 19.536 | 1991 | 19.208 | 1990 | 18.884 | 1989 | 18.565 | 1988 | 18.221 | 1987 | 17.725 | 1986 | 17.241 | 1985 | 16.767 | 1984 | 16.305 | 1983 | 15.851 | 1982 | 15.409 | 1981 | 14.976 | 1980 | 14.555 | 1979 | 14.141 | 1978 | 13.659 | 1977 | 12.773 | 1976 | 11.937 | 1975 | 11.146 | 1974 | 10.403 | 1973 | 9.704 | 1972 | 9.048 | 1971 | 8.431 | 1970 | 7.852 | 1969 | 7.311 | 1968 | 6.804 | 1967 | 6.373 | 1966 | 6.199 | 1965 | 6.03 | 1964 | 5.865 | 1963 | 5.704 | 1962 | 5.547 | 1961 | 5.394 | 1960 | 5.246 |
|