| Year | Value | | 2022 | 40,202 | | 2021 | 40,066 | | 2020 | 39,631 | | 2019 | 38,916 | | 2018 | 38,181 | | 2017 | 37,572 | | 2016 | 37,015 | | 2015 | 36,423 | | 2014 | 35,747 | | 2013 | 34,963 | | 2012 | 34,098 | | 2011 | 33,191 | | 2010 | 32,295 | | 2009 | 31,417 | | 2008 | 30,532 | | 2007 | 29,645 | | 2006 | 28,758 | | 2005 | 27,863 | | 2004 | 26,968 | | 2003 | 26,087 | | 2002 | 25,219 | | 2001 | 24,375 | | 2000 | 23,574 | | 1999 | 22,804 | | 1998 | 22,063 | | 1997 | 21,349 | | 1996 | 20,633 | | 1995 | 19,907 | | 1994 | 19,183 | | 1993 | 18,472 | | 1992 | 17,773 | | 1991 | 17,078 | | 1990 | 16,389 | | 1989 | 15,711 | | 1988 | 15,047 | | 1987 | 14,405 | | 1986 | 13,800 | | 1985 | 13,250 | | 1984 | 12,755 | | 1983 | 12,307 | | 1982 | 11,891 | | 1981 | 11,501 | | 1980 | 11,139 | | 1979 | 10,811 | | 1978 | 10,523 | | 1977 | 10,265 | | 1976 | 10,004 | | 1975 | 9,719 | | 1974 | 9,414 | | 1973 | 9,079 | | 1972 | 8,738 | | 1971 | 8,428 | | 1970 | 8,159 | | 1969 | 7,929 | | 1968 | 7,748 | | 1967 | 7,614 | | 1966 | 7,500 | | 1965 | 7,387 | | 1964 | 7,278 | | 1963 | 7,172 | | 1962 | 7,061 | | 1961 | 6,954 | | 1960 | 6,859 |
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