| Year | Value | | 2024 | 806 | | 2023 | 813 | | 2022 | 814 | | 2021 | 818 | | 2020 | 824 | | 2019 | 830 | | 2018 | 836 | | 2017 | 845 | | 2016 | 857 | | 2015 | 867 | | 2014 | 862 | | 2013 | 842 | | 2012 | 843 | | 2011 | 879 | | 2010 | 920 | | 2009 | 961 | | 2008 | 1,002 | | 2007 | 1,039 | | 2006 | 1,067 | | 2005 | 1,081 | | 2004 | 1,065 | | 2003 | 1,031 | | 2002 | 1,000 | | 2001 | 979 | | 2000 | 963 | | 1999 | 929 | | 1998 | 880 | | 1997 | 826 | | 1996 | 770 | | 1995 | 724 | | 1994 | 691 | | 1993 | 659 | | 1992 | 622 | | 1991 | 581 | | 1990 | 536 | | 1989 | 485 | | 1988 | 436 | | 1987 | 391 | | 1986 | 351 | | 1985 | 320 | | 1984 | 299 | | 1983 | 283 | | 1982 | 272 | | 1981 | 265 | | 1980 | 257 | | 1979 | 251 | | 1978 | 247 | | 1977 | 239 | | 1976 | 232 | | 1975 | 229 |
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