| Year | Value | | 2022 | 43,942 | | 2021 | 41,368 | | 2020 | 39,154 | | 2019 | 37,368 | | 2018 | 35,973 | | 2017 | 35,098 | | 2016 | 34,576 | | 2015 | 34,103 | | 2014 | 33,537 | | 2013 | 32,839 | | 2012 | 32,018 | | 2011 | 31,158 | | 2010 | 30,309 | | 2009 | 29,416 | | 2008 | 28,466 | | 2007 | 27,502 | | 2006 | 26,497 | | 2005 | 25,401 | | 2004 | 24,266 | | 2003 | 23,135 | | 2002 | 21,961 | | 2001 | 20,746 | | 2000 | 19,573 | | 1999 | 18,523 | | 1998 | 17,636 | | 1997 | 16,923 | | 1996 | 16,367 | | 1995 | 15,884 | | 1994 | 15,390 | | 1993 | 14,876 | | 1992 | 14,348 | | 1991 | 13,833 | | 1990 | 13,356 | | 1989 | 12,915 | | 1988 | 12,525 | | 1987 | 12,200 | | 1986 | 11,900 | | 1985 | 11,595 | | 1984 | 11,296 | | 1983 | 10,987 | | 1982 | 10,647 | | 1981 | 10,296 | | 1980 | 9,956 | | 1979 | 9,679 | | 1978 | 9,442 | | 1977 | 9,165 | | 1976 | 8,885 | | 1975 | 8,635 | | 1974 | 8,416 | | 1973 | 8,229 | | 1972 | 8,102 | | 1971 | 7,955 | | 1970 | 7,722 | | 1969 | 7,447 | | 1968 | 7,129 | | 1967 | 6,785 | | 1966 | 6,475 | | 1965 | 6,242 | | 1964 | 6,085 | | 1963 | 6,005 | | 1962 | 5,989 | | 1961 | 5,979 | | 1960 | 5,934 |
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