| Year | Value | | 2024 | 22,592 | | 2023 | 21,617 | | 2022 | 20,665 | | 2021 | 19,765 | | 2020 | 18,908 | | 2019 | 18,073 | | 2018 | 17,272 | | 2017 | 16,512 | | 2016 | 15,791 | | 2015 | 15,109 | | 2014 | 14,463 | | 2013 | 13,851 | | 2012 | 13,282 | | 2011 | 12,786 | | 2010 | 12,412 | | 2009 | 12,185 | | 2008 | 12,055 | | 2007 | 11,944 | | 2006 | 11,792 | | 2005 | 11,563 | | 2004 | 11,235 | | 2003 | 10,841 | | 2002 | 10,421 | | 2001 | 9,986 | | 2000 | 9,579 | | 1999 | 9,209 | | 1998 | 8,852 | | 1997 | 8,495 | | 1996 | 8,181 | | 1995 | 7,946 | | 1994 | 7,821 | | 1993 | 7,624 | | 1992 | 7,725 | | 1991 | 7,751 | | 1990 | 7,091 | | 1989 | 6,382 | | 1988 | 5,887 | | 1987 | 5,503 | | 1986 | 5,147 | | 1985 | 4,846 | | 1984 | 4,607 | | 1983 | 4,418 | | 1982 | 4,254 | | 1981 | 4,079 | | 1980 | 3,864 | | 1979 | 3,603 | | 1978 | 3,307 | | 1977 | 3,000 | | 1976 | 2,713 | | 1975 | 2,463 |
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