| Year | Value | | 2024 | 32,308 | | 2023 | 31,680 | | 2022 | 30,935 | | 2021 | 30,125 | | 2020 | 29,237 | | 2019 | 28,265 | | 2018 | 27,241 | | 2017 | 26,188 | | 2016 | 25,129 | | 2015 | 24,082 | | 2014 | 23,058 | | 2013 | 22,061 | | 2012 | 21,097 | | 2011 | 20,169 | | 2010 | 19,283 | | 2009 | 18,432 | | 2008 | 17,622 | | 2007 | 16,871 | | 2006 | 16,154 | | 2005 | 15,523 | | 2004 | 15,003 | | 2003 | 14,524 | | 2002 | 13,975 | | 2001 | 13,368 | | 2000 | 12,898 | | 1999 | 12,608 | | 1998 | 12,385 | | 1997 | 12,117 | | 1996 | 11,893 | | 1995 | 11,729 | | 1994 | 11,584 | | 1993 | 11,244 | | 1992 | 11,343 | | 1991 | 11,343 | | 1990 | 10,343 | | 1989 | 9,287 | | 1988 | 8,563 | | 1987 | 8,007 | | 1986 | 7,494 | | 1985 | 7,064 | | 1984 | 6,724 | | 1983 | 6,456 | | 1982 | 6,220 | | 1981 | 5,968 | | 1980 | 5,661 | | 1979 | 5,284 | | 1978 | 4,854 | | 1977 | 4,409 | | 1976 | 3,994 | | 1975 | 3,632 |
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