| Year | Value | | 2024 | 2,424 | | 2023 | 2,336 | | 2022 | 2,244 | | 2021 | 2,171 | | 2020 | 2,112 | | 2019 | 2,038 | | 2018 | 1,965 | | 2017 | 1,915 | | 2016 | 1,895 | | 2015 | 1,896 | | 2014 | 1,900 | | 2013 | 1,884 | | 2012 | 1,834 | | 2011 | 1,747 | | 2010 | 1,642 | | 2009 | 1,545 | | 2008 | 1,480 | | 2007 | 1,465 | | 2006 | 1,486 | | 2005 | 1,506 | | 2004 | 1,501 | | 2003 | 1,473 | | 2002 | 1,434 | | 2001 | 1,396 | | 2000 | 1,358 | | 1999 | 1,321 | | 1998 | 1,281 | | 1997 | 1,240 | | 1996 | 1,196 | | 1995 | 1,155 | | 1994 | 1,120 | | 1993 | 1,084 | | 1992 | 1,053 | | 1991 | 1,024 | | 1990 | 994 | | 1989 | 964 | | 1988 | 934 | | 1987 | 907 | | 1986 | 880 | | 1985 | 854 | | 1984 | 825 | | 1983 | 788 | | 1982 | 745 | | 1981 | 701 | | 1980 | 656 | | 1979 | 612 | | 1978 | 573 | | 1977 | 540 | | 1976 | 513 | | 1975 | 489 |
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