| Year | Value | | 2022 | 38,292 | | 2021 | 37,401 | | 2020 | 36,384 | | 2019 | 35,331 | | 2018 | 34,274 | | 2017 | 33,218 | | 2016 | 32,058 | | 2015 | 30,034 | | 2014 | 27,882 | | 2013 | 26,337 | | 2012 | 24,983 | | 2011 | 23,651 | | 2010 | 22,179 | | 2009 | 20,948 | | 2008 | 19,858 | | 2007 | 18,833 | | 2006 | 17,250 | | 2005 | 15,779 | | 2004 | 15,112 | | 2003 | 14,539 | | 2002 | 14,006 | | 2001 | 13,441 | | 2000 | 12,826 | | 1999 | 12,171 | | 1998 | 11,487 | | 1997 | 10,814 | | 1996 | 10,194 | | 1995 | 9,624 | | 1994 | 9,087 | | 1993 | 8,585 | | 1992 | 8,132 | | 1991 | 7,736 | | 1990 | 7,403 | | 1989 | 7,113 | | 1988 | 6,863 | | 1987 | 6,647 | | 1986 | 6,425 | | 1985 | 6,184 | | 1984 | 5,930 | | 1983 | 5,666 | | 1982 | 5,407 | | 1981 | 5,177 | | 1980 | 4,991 | | 1979 | 4,844 | | 1978 | 4,737 | | 1977 | 4,669 | | 1976 | 4,644 | | 1975 | 4,663 | | 1974 | 4,723 | | 1973 | 4,811 | | 1972 | 4,882 | | 1971 | 4,885 | | 1970 | 4,792 | | 1969 | 4,598 | | 1968 | 4,317 | | 1967 | 4,006 | | 1966 | 3,724 | | 1965 | 3,503 | | 1964 | 3,338 | | 1963 | 3,219 | | 1962 | 3,131 | | 1961 | 3,053 | | 1960 | 2,979 |
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