| Year | Value | | 2023 | 10,871 | | 2022 | 10,336 | | 2021 | 9,853 | | 2020 | 9,415 | | 2019 | 9,009 | | 2018 | 8,643 | | 2017 | 8,318 | | 2016 | 8,036 | | 2015 | 7,813 | | 2014 | 7,663 | | 2013 | 7,589 | | 2012 | 7,579 | | 2011 | 7,614 | | 2010 | 7,677 | | 2009 | 7,742 | | 2008 | 7,691 | | 2007 | 7,508 | | 2006 | 7,276 | | 2005 | 6,984 | | 2004 | 6,629 | | 2003 | 6,317 | | 2002 | 6,068 | | 2001 | 5,803 | | 2000 | 5,538 | | 1999 | 5,287 | | 1998 | 5,057 | | 1997 | 4,855 | | 1996 | 4,672 | | 1995 | 4,502 | | 1994 | 4,339 | | 1993 | 4,174 | | 1992 | 4,004 | | 1991 | 3,837 | | 1990 | 3,675 | | 1989 | 3,517 | | 1988 | 3,373 | | 1987 | 3,249 | | 1986 | 3,142 | | 1985 | 3,048 | | 1984 | 2,967 | | 1983 | 2,894 | | 1982 | 2,826 | | 1981 | 2,760 | | 1980 | 2,693 | | 1979 | 2,622 | | 1978 | 2,548 | | 1977 | 2,470 | | 1976 | 2,389 | | 1975 | 2,306 |
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