| Year | Value | | 2024 | 11,889 | | 2023 | 11,803 | | 2022 | 11,796 | | 2021 | 11,777 | | 2020 | 11,798 | | 2019 | 11,846 | | 2018 | 11,814 | | 2017 | 11,683 | | 2016 | 11,466 | | 2015 | 11,169 | | 2014 | 10,780 | | 2013 | 10,299 | | 2012 | 9,736 | | 2011 | 9,105 | | 2010 | 8,425 | | 2009 | 7,752 | | 2008 | 7,136 | | 2007 | 6,585 | | 2006 | 6,088 | | 2005 | 5,649 | | 2004 | 5,266 | | 2003 | 4,934 | | 2002 | 4,659 | | 2001 | 4,439 | | 2000 | 4,224 | | 1999 | 3,972 | | 1998 | 3,728 | | 1997 | 3,540 | | 1996 | 3,412 | | 1995 | 3,337 | | 1994 | 3,309 | | 1993 | 3,322 | | 1992 | 3,368 | | 1991 | 3,443 | | 1990 | 3,536 | | 1989 | 3,634 | | 1988 | 3,722 | | 1987 | 3,796 | | 1986 | 3,852 | | 1985 | 3,886 | | 1984 | 3,899 | | 1983 | 3,888 | | 1982 | 3,859 | | 1981 | 3,814 | | 1980 | 3,816 | | 1979 | 3,914 | | 1978 | 4,068 | | 1977 | 4,249 | | 1976 | 4,450 | | 1975 | 4,660 |
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