| Year | Value | | 2023 | 2,849 | | 2022 | 2,713 | | 2021 | 2,596 | | 2020 | 2,476 | | 2019 | 2,347 | | 2018 | 2,216 | | 2017 | 2,086 | | 2016 | 1,968 | | 2015 | 1,877 | | 2014 | 1,809 | | 2013 | 1,759 | | 2012 | 1,722 | | 2011 | 1,693 | | 2010 | 1,655 | | 2009 | 1,606 | | 2008 | 1,555 | | 2007 | 1,490 | | 2006 | 1,403 | | 2005 | 1,313 | | 2004 | 1,234 | | 2003 | 1,158 | | 2002 | 1,070 | | 2001 | 981 | | 2000 | 895 | | 1999 | 804 | | 1998 | 723 | | 1997 | 675 | | 1996 | 656 | | 1995 | 640 | | 1994 | 636 | | 1993 | 643 | | 1992 | 665 | | 1991 | 687 | | 1990 | 689 | | 1989 | 679 | | 1988 | 673 | | 1987 | 670 | | 1986 | 672 | | 1985 | 697 | | 1984 | 731 | | 1983 | 750 | | 1982 | 750 | | 1981 | 721 | | 1980 | 675 | | 1979 | 641 | | 1978 | 611 | | 1977 | 572 | | 1976 | 533 | | 1975 | 496 | | 1974 | 458 |
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