| Year | Value | | 2022 | 52,861 | | 2021 | 51,458 | | 2020 | 50,280 | | 2019 | 49,336 | | 2018 | 48,616 | | 2017 | 48,060 | | 2016 | 47,501 | | 2015 | 46,842 | | 2014 | 46,065 | | 2013 | 45,187 | | 2012 | 44,269 | | 2011 | 43,329 | | 2010 | 42,365 | | 2009 | 41,418 | | 2008 | 40,505 | | 2007 | 39,700 | | 2006 | 38,979 | | 2005 | 38,629 | | 2004 | 38,774 | | 2003 | 39,046 | | 2002 | 38,771 | | 2001 | 37,749 | | 2000 | 36,602 | | 1999 | 35,382 | | 1998 | 33,824 | | 1997 | 31,849 | | 1996 | 30,202 | | 1995 | 29,279 | | 1994 | 28,816 | | 1993 | 28,057 | | 1992 | 28,359 | | 1991 | 28,353 | | 1990 | 25,835 | | 1989 | 23,149 | | 1988 | 21,263 | | 1987 | 19,787 | | 1986 | 18,427 | | 1985 | 17,279 | | 1984 | 16,370 | | 1983 | 15,654 | | 1982 | 15,024 | | 1981 | 14,360 | | 1980 | 13,568 | | 1979 | 12,616 | | 1978 | 11,547 | | 1977 | 10,458 | | 1976 | 9,453 | | 1975 | 8,618 | | 1974 | 8,025 | | 1973 | 7,636 | | 1972 | 7,324 | | 1971 | 7,026 | | 1970 | 6,737 | | 1969 | 6,388 | | 1968 | 6,002 | | 1967 | 5,657 | | 1966 | 5,331 | | 1965 | 5,019 | | 1964 | 4,725 | | 1963 | 4,470 | | 1962 | 4,257 | | 1961 | 4,075 | | 1960 | 3,917 |
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