| Year | Value | | 2024 | 9,505 | | 2023 | 9,162 | | 2022 | 8,811 | | 2021 | 8,511 | | 2020 | 8,261 | | 2019 | 8,010 | | 2018 | 7,755 | | 2017 | 7,514 | | 2016 | 7,261 | | 2015 | 7,053 | | 2014 | 6,921 | | 2013 | 6,753 | | 2012 | 6,438 | | 2011 | 5,999 | | 2010 | 5,552 | | 2009 | 5,209 | | 2008 | 5,069 | | 2007 | 5,152 | | 2006 | 5,398 | | 2005 | 5,710 | | 2004 | 5,969 | | 2003 | 6,055 | | 2002 | 5,949 | | 2001 | 5,817 | | 2000 | 5,830 | | 1999 | 6,009 | | 1998 | 6,090 | | 1997 | 5,975 | | 1996 | 5,818 | | 1995 | 5,636 | | 1994 | 5,445 | | 1993 | 5,250 | | 1992 | 5,060 | | 1991 | 4,880 | | 1990 | 4,720 | | 1989 | 4,587 | | 1988 | 4,465 | | 1987 | 4,353 | | 1986 | 4,254 | | 1985 | 4,167 | | 1984 | 4,093 | | 1983 | 4,030 | | 1982 | 3,977 | | 1981 | 3,931 | | 1980 | 3,912 | | 1979 | 3,891 | | 1978 | 3,832 | | 1977 | 3,742 | | 1976 | 3,631 | | 1975 | 3,504 |
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