| Year | Value | | 2022 | 70,224 | | 2021 | 68,333 | | 2020 | 66,313 | | 2019 | 63,835 | | 2018 | 61,074 | | 2017 | 58,284 | | 2016 | 55,593 | | 2015 | 53,116 | | 2014 | 50,923 | | 2013 | 48,983 | | 2012 | 47,228 | | 2011 | 45,584 | | 2010 | 44,022 | | 2009 | 42,524 | | 2008 | 40,997 | | 2007 | 39,431 | | 2006 | 37,921 | | 2005 | 36,518 | | 2004 | 35,201 | | 2003 | 33,987 | | 2002 | 32,864 | | 2001 | 31,761 | | 2000 | 30,631 | | 1999 | 29,486 | | 1998 | 28,319 | | 1997 | 27,122 | | 1996 | 25,947 | | 1995 | 24,844 | | 1994 | 23,792 | | 1993 | 22,755 | | 1992 | 21,770 | | 1991 | 20,880 | | 1990 | 20,095 | | 1989 | 19,427 | | 1988 | 18,882 | | 1987 | 18,401 | | 1986 | 17,898 | | 1985 | 17,343 | | 1984 | 16,738 | | 1983 | 16,060 | | 1982 | 15,345 | | 1981 | 14,659 | | 1980 | 14,040 | | 1979 | 13,461 | | 1978 | 12,872 | | 1977 | 12,288 | | 1976 | 11,707 | | 1975 | 11,125 | | 1974 | 10,564 | | 1973 | 10,030 | | 1972 | 9,538 | | 1971 | 9,104 | | 1970 | 8,711 | | 1969 | 8,353 | | 1968 | 8,002 | | 1967 | 7,651 | | 1966 | 7,314 | | 1965 | 7,003 | | 1964 | 6,724 | | 1963 | 6,479 | | 1962 | 6,269 | | 1961 | 6,072 | | 1960 | 5,875 |
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