| Year | Value | | 2024 | 3,037 | | 2023 | 3,119 | | 2022 | 3,204 | | 2021 | 3,293 | | 2020 | 3,383 | | 2019 | 3,476 | | 2018 | 3,575 | | 2017 | 3,676 | | 2016 | 3,777 | | 2015 | 3,881 | | 2014 | 3,983 | | 2013 | 4,083 | | 2012 | 4,229 | | 2011 | 4,427 | | 2010 | 4,633 | | 2009 | 4,844 | | 2008 | 5,058 | | 2007 | 5,278 | | 2006 | 5,504 | | 2005 | 5,717 | | 2004 | 5,870 | | 2003 | 5,976 | | 2002 | 5,881 | | 2001 | 5,788 | | 2000 | 5,689 | | 1999 | 5,560 | | 1998 | 5,404 | | 1997 | 5,239 | | 1996 | 5,066 | | 1995 | 4,912 | | 1994 | 4,852 | | 1993 | 4,796 | | 1992 | 4,743 | | 1991 | 4,690 | | 1990 | 4,640 | | 1989 | 4,597 | | 1988 | 4,556 | | 1987 | 4,509 | | 1986 | 4,461 | | 1985 | 4,465 | | 1984 | 4,480 | | 1983 | 4,497 | | 1982 | 4,516 | | 1981 | 4,538 | | 1980 | 4,596 | | 1979 | 4,656 | | 1978 | 4,729 | | 1977 | 4,797 | | 1976 | 4,860 | | 1975 | 4,918 |
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