| Year | Value | | 2024 | 16,983 | | 2023 | 16,229 | | 2022 | 15,507 | | 2021 | 14,840 | | 2020 | 14,217 | | 2019 | 13,610 | | 2018 | 13,026 | | 2017 | 12,485 | | 2016 | 12,011 | | 2015 | 11,652 | | 2014 | 11,431 | | 2013 | 11,293 | | 2012 | 11,162 | | 2011 | 10,994 | | 2010 | 10,737 | | 2009 | 10,361 | | 2008 | 9,931 | | 2007 | 9,526 | | 2006 | 9,149 | | 2005 | 8,808 | | 2004 | 8,514 | | 2003 | 8,251 | | 2002 | 7,981 | | 2001 | 7,696 | | 2000 | 7,425 | | 1999 | 7,167 | | 1998 | 6,904 | | 1997 | 6,635 | | 1996 | 6,395 | | 1995 | 6,210 | | 1994 | 6,110 | | 1993 | 5,956 | | 1992 | 6,035 | | 1991 | 6,053 | | 1990 | 5,534 | | 1989 | 4,976 | | 1988 | 4,586 | | 1987 | 4,284 | | 1986 | 4,003 | | 1985 | 3,767 | | 1984 | 3,580 | | 1983 | 3,430 | | 1982 | 3,297 | | 1981 | 3,156 | | 1980 | 2,986 | | 1979 | 2,780 | | 1978 | 2,547 | | 1977 | 2,307 | | 1976 | 2,083 | | 1975 | 1,890 |
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