Year | Value | 2022 | 24,713 | 2021 | 23,826 | 2020 | 23,320 | 2019 | 23,268 | 2018 | 23,541 | 2017 | 23,830 | 2016 | 24,090 | 2015 | 24,348 | 2014 | 24,603 | 2013 | 24,882 | 2012 | 25,193 | 2011 | 25,320 | 2010 | 25,261 | 2009 | 25,173 | 2008 | 24,978 | 2007 | 24,656 | 2006 | 24,310 | 2005 | 23,896 | 2004 | 23,298 | 2003 | 22,545 | 2002 | 21,700 | 2001 | 20,757 | 2000 | 19,722 | 1999 | 18,893 | 1998 | 18,363 | 1997 | 17,948 | 1996 | 17,661 | 1995 | 17,511 | 1994 | 17,195 | 1993 | 16,686 | 1992 | 16,265 | 1991 | 15,972 | 1990 | 15,752 | 1989 | 15,588 | 1988 | 15,437 | 1987 | 15,191 | 1986 | 14,778 | 1985 | 14,257 | 1984 | 13,724 | 1983 | 13,172 | 1982 | 12,608 | 1981 | 12,055 | 1980 | 11,520 | 1979 | 11,002 | 1978 | 10,519 | 1977 | 10,075 | 1976 | 9,671 | 1975 | 9,312 | 1974 | 8,994 | 1973 | 8,722 | 1972 | 8,492 | 1971 | 8,304 | 1970 | 8,152 | 1969 | 8,018 | 1968 | 7,882 | 1967 | 7,735 | 1966 | 7,547 | 1965 | 7,322 | 1964 | 7,081 | 1963 | 6,818 | 1962 | 6,536 | 1961 | 6,239 | 1960 | 5,939 |
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