| Year | Value | | 2024 | 33,889 | | 2023 | 33,247 | | 2022 | 32,483 | | 2021 | 31,638 | | 2020 | 30,707 | | 2019 | 29,691 | | 2018 | 28,620 | | 2017 | 27,518 | | 2016 | 26,403 | | 2015 | 25,299 | | 2014 | 24,218 | | 2013 | 23,165 | | 2012 | 22,146 | | 2011 | 21,169 | | 2010 | 20,235 | | 2009 | 19,337 | | 2008 | 18,486 | | 2007 | 17,698 | | 2006 | 16,948 | | 2005 | 16,283 | | 2004 | 15,723 | | 2003 | 15,207 | | 2002 | 14,639 | | 2001 | 14,035 | | 2000 | 13,569 | | 1999 | 13,283 | | 1998 | 13,060 | | 1997 | 12,794 | | 1996 | 12,558 | | 1995 | 12,367 | | 1994 | 12,198 | | 1993 | 11,831 | | 1992 | 11,917 | | 1991 | 11,898 | | 1990 | 10,844 | | 1989 | 9,736 | | 1988 | 8,975 | | 1987 | 8,392 | | 1986 | 7,854 | | 1985 | 7,401 | | 1984 | 7,044 | | 1983 | 6,761 | | 1982 | 6,512 | | 1981 | 6,247 | | 1980 | 5,925 | | 1979 | 5,530 | | 1978 | 5,079 | | 1977 | 4,614 | | 1976 | 4,181 | | 1975 | 3,803 |
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