| Year | Value | | 2024 | 5,885 | | 2023 | 5,740 | | 2022 | 5,585 | | 2021 | 5,500 | | 2020 | 5,477 | | 2019 | 5,460 | | 2018 | 5,429 | | 2017 | 5,366 | | 2016 | 5,172 | | 2015 | 4,965 | | 2014 | 4,920 | | 2013 | 4,934 | | 2012 | 4,788 | | 2011 | 4,432 | | 2010 | 4,007 | | 2009 | 3,621 | | 2008 | 3,382 | | 2007 | 3,344 | | 2006 | 3,475 | | 2005 | 3,692 | | 2004 | 3,885 | | 2003 | 3,933 | | 2002 | 3,671 | | 2001 | 3,243 | | 2000 | 2,965 | | 1999 | 2,902 | | 1998 | 2,926 | | 1997 | 2,925 | | 1996 | 2,918 | | 1995 | 2,910 | | 1994 | 2,899 | | 1993 | 2,888 | | 1992 | 2,877 | | 1991 | 2,816 | | 1990 | 2,733 | | 1989 | 2,684 | | 1988 | 2,634 | | 1987 | 2,578 | | 1986 | 2,522 | | 1985 | 2,466 | | 1984 | 2,407 | | 1983 | 2,348 | | 1982 | 2,290 | | 1981 | 2,230 | | 1980 | 2,211 | | 1979 | 2,210 | | 1978 | 2,178 | | 1977 | 2,123 | | 1976 | 2,046 | | 1975 | 1,954 |
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