| Year | Value | | 2022 | 45,703 | | 2021 | 45,114 | | 2020 | 44,276 | | 2019 | 43,080 | | 2018 | 41,487 | | 2017 | 39,844 | | 2016 | 38,246 | | 2015 | 36,538 | | 2014 | 34,985 | | 2013 | 33,594 | | 2012 | 32,081 | | 2011 | 30,816 | | 2010 | 29,726 | | 2009 | 28,581 | | 2008 | 27,422 | | 2007 | 26,268 | | 2006 | 25,128 | | 2005 | 23,995 | | 2004 | 22,869 | | 2003 | 21,739 | | 2002 | 20,598 | | 2001 | 19,578 | | 2000 | 18,744 | | 1999 | 17,984 | | 1998 | 17,239 | | 1997 | 16,515 | | 1996 | 15,806 | | 1995 | 15,101 | | 1994 | 14,402 | | 1993 | 13,704 | | 1992 | 13,014 | | 1991 | 12,329 | | 1990 | 11,709 | | 1989 | 11,227 | | 1988 | 10,816 | | 1987 | 10,400 | | 1986 | 9,986 | | 1985 | 9,577 | | 1984 | 9,166 | | 1983 | 8,758 | | 1982 | 8,355 | | 1981 | 7,957 | | 1980 | 7,598 | | 1979 | 7,332 | | 1978 | 7,110 | | 1977 | 6,885 | | 1976 | 6,668 | | 1975 | 6,451 | | 1974 | 6,249 | | 1973 | 6,068 | | 1972 | 5,896 | | 1971 | 5,742 | | 1970 | 5,665 | | 1969 | 5,663 | | 1968 | 5,668 | | 1967 | 5,662 | | 1966 | 5,652 | | 1965 | 5,650 | | 1964 | 5,642 | | 1963 | 5,634 | | 1962 | 5,633 | | 1961 | 5,625 | | 1960 | 5,604 |
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