Year | Value | 2022 | 39,513 | 2021 | 37,451 | 2020 | 35,560 | 2019 | 33,792 | 2018 | 32,281 | 2017 | 30,981 | 2016 | 29,761 | 2015 | 28,612 | 2014 | 27,490 | 2013 | 26,359 | 2012 | 25,347 | 2011 | 24,507 | 2010 | 23,856 | 2009 | 23,363 | 2008 | 23,165 | 2007 | 23,206 | 2006 | 23,143 | 2005 | 22,925 | 2004 | 22,579 | 2003 | 22,133 | 2002 | 21,729 | 2001 | 21,494 | 2000 | 21,324 | 1999 | 21,339 | 1998 | 21,579 | 1997 | 21,794 | 1996 | 21,723 | 1995 | 21,304 | 1994 | 20,690 | 1993 | 20,000 | 1992 | 19,469 | 1991 | 19,267 | 1990 | 19,371 | 1989 | 19,695 | 1988 | 20,011 | 1987 | 19,947 | 1986 | 19,362 | 1985 | 18,402 | 1984 | 17,217 | 1983 | 15,971 | 1982 | 15,011 | 1981 | 14,524 | 1980 | 14,316 | 1979 | 14,175 | 1978 | 14,002 | 1977 | 13,761 | 1976 | 13,508 | 1975 | 13,300 | 1974 | 13,052 | 1973 | 12,741 | 1972 | 12,437 | 1971 | 12,141 | 1970 | 11,851 | 1969 | 11,570 | 1968 | 11,298 | 1967 | 11,036 | 1966 | 10,770 | 1965 | 10,494 | 1964 | 10,211 | 1963 | 9,917 | 1962 | 9,620 | 1961 | 9,335 | 1960 | 9,071 |
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