Year | Value | 2022 | 26,505 | 2021 | 26,097 | 2020 | 25,709 | 2019 | 25,408 | 2018 | 25,184 | 2017 | 24,966 | 2016 | 24,762 | 2015 | 24,581 | 2014 | 24,420 | 2013 | 24,280 | 2012 | 24,162 | 2011 | 24,064 | 2010 | 23,990 | 2009 | 24,060 | 2008 | 24,253 | 2007 | 24,444 | 2006 | 24,624 | 2005 | 24,773 | 2004 | 24,884 | 2003 | 24,966 | 2002 | 25,008 | 2001 | 24,998 | 2000 | 24,945 | 1999 | 25,374 | 1998 | 25,973 | 1997 | 26,549 | 1996 | 27,112 | 1995 | 27,657 | 1994 | 27,814 | 1993 | 27,165 | 1992 | 26,429 | 1991 | 25,862 | 1990 | 25,457 | 1989 | 25,055 | 1988 | 24,649 | 1987 | 24,155 | 1986 | 23,578 | 1985 | 23,002 | 1984 | 22,426 | 1983 | 21,855 | 1982 | 21,295 | 1981 | 20,746 | 1980 | 20,177 | 1979 | 19,512 | 1978 | 18,866 | 1977 | 18,302 | 1976 | 17,819 | 1975 | 17,356 | 1974 | 16,874 | 1973 | 16,351 | 1972 | 15,772 | 1971 | 15,210 | 1970 | 14,634 | 1969 | 14,052 | 1968 | 13,497 | 1967 | 12,967 | 1966 | 12,452 | 1965 | 11,947 | 1964 | 11,465 | 1963 | 11,004 | 1962 | 10,532 | 1961 | 10,050 | 1960 | 9,591 |
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