| Year | Value | | 2023 | 8,757 | | 2022 | 7,897 | | 2021 | 6,993 | | 2020 | 6,204 | | 2019 | 5,606 | | 2018 | 5,245 | | 2017 | 5,153 | | 2016 | 5,169 | | 2015 | 5,207 | | 2014 | 4,905 | | 2013 | 4,248 | | 2012 | 3,868 | | 2011 | 3,763 | | 2010 | 3,614 | | 2009 | 3,411 | | 2008 | 3,203 | | 2007 | 3,043 | | 2006 | 2,940 | | 2005 | 2,897 | | 2004 | 2,929 | | 2003 | 3,011 | | 2002 | 3,047 | | 2001 | 3,002 | | 2000 | 2,895 | | 1999 | 2,727 | | 1998 | 2,540 | | 1997 | 2,391 | | 1996 | 2,268 | | 1995 | 2,158 | | 1994 | 2,057 | | 1993 | 1,951 | | 1992 | 1,838 | | 1991 | 1,723 | | 1990 | 1,635 | | 1989 | 1,576 | | 1988 | 1,515 | | 1987 | 1,452 | | 1986 | 1,391 | | 1985 | 1,330 | | 1984 | 1,271 | | 1983 | 1,215 | | 1982 | 1,169 | | 1981 | 1,136 | | 1980 | 1,126 | | 1979 | 1,121 | | 1978 | 1,105 | | 1977 | 1,081 | | 1976 | 1,054 | | 1975 | 1,028 | | 1974 | 1,003 |
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