| Year | Value | | 2022 | 56,727 | | 2021 | 54,526 | | 2020 | 52,033 | | 2019 | 49,436 | | 2018 | 46,873 | | 2017 | 44,657 | | 2016 | 42,859 | | 2015 | 40,482 | | 2014 | 38,465 | | 2013 | 37,617 | | 2012 | 37,151 | | 2011 | 36,537 | | 2010 | 35,283 | | 2009 | 33,863 | | 2008 | 32,219 | | 2007 | 30,383 | | 2006 | 27,470 | | 2005 | 24,640 | | 2004 | 23,036 | | 2003 | 21,563 | | 2002 | 20,233 | | 2001 | 19,048 | | 2000 | 18,002 | | 1999 | 17,088 | | 1998 | 16,291 | | 1997 | 15,583 | | 1996 | 14,899 | | 1995 | 14,179 | | 1994 | 13,409 | | 1993 | 12,603 | | 1992 | 11,807 | | 1991 | 11,070 | | 1990 | 10,419 | | 1989 | 9,886 | | 1988 | 9,459 | | 1987 | 9,099 | | 1986 | 8,802 | | 1985 | 8,568 | | 1984 | 8,390 | | 1983 | 8,261 | | 1982 | 8,151 | | 1981 | 8,034 | | 1980 | 7,913 | | 1979 | 7,791 | | 1978 | 7,665 | | 1977 | 7,550 | | 1976 | 7,464 | | 1975 | 7,415 | | 1974 | 7,394 | | 1973 | 7,391 | | 1972 | 7,398 | | 1971 | 7,390 | | 1970 | 7,342 | | 1969 | 7,236 | | 1968 | 7,061 | | 1967 | 6,836 | | 1966 | 6,591 | | 1965 | 6,351 | | 1964 | 6,134 | | 1963 | 5,937 | | 1962 | 5,747 | | 1961 | 5,557 | | 1960 | 5,365 |
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