| Year | Value | | 2024 | 7,101 | | 2023 | 7,281 | | 2022 | 7,439 | | 2021 | 7,634 | | 2020 | 7,820 | | 2019 | 7,762 | | 2018 | 7,495 | | 2017 | 7,195 | | 2016 | 6,905 | | 2015 | 6,599 | | 2014 | 6,282 | | 2013 | 5,995 | | 2012 | 5,748 | | 2011 | 5,495 | | 2010 | 5,213 | | 2009 | 4,897 | | 2008 | 4,563 | | 2007 | 4,238 | | 2006 | 3,945 | | 2005 | 3,686 | | 2004 | 3,467 | | 2003 | 3,277 | | 2002 | 3,103 | | 2001 | 2,955 | | 2000 | 2,848 | | 1999 | 2,829 | | 1998 | 2,911 | | 1997 | 3,073 | | 1996 | 3,264 | | 1995 | 3,437 | | 1994 | 3,557 | | 1993 | 3,608 | | 1992 | 3,590 | | 1991 | 3,512 | | 1990 | 3,398 | | 1989 | 3,279 | | 1988 | 3,192 | | 1987 | 3,137 | | 1986 | 3,078 | | 1985 | 3,003 | | 1984 | 2,925 | | 1983 | 2,848 | | 1982 | 2,750 | | 1981 | 2,617 | | 1980 | 2,469 | | 1979 | 2,351 | | 1978 | 2,275 | | 1977 | 2,216 | | 1976 | 2,158 | | 1975 | 2,107 |
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