| Year | Value | | 2024 | 805 | | 2023 | 813 | | 2022 | 819 | | 2021 | 826 | | 2020 | 831 | | 2019 | 831 | | 2018 | 828 | | 2017 | 824 | | 2016 | 824 | | 2015 | 818 | | 2014 | 808 | | 2013 | 806 | | 2012 | 819 | | 2011 | 840 | | 2010 | 856 | | 2009 | 866 | | 2008 | 872 | | 2007 | 867 | | 2006 | 858 | | 2005 | 843 | | 2004 | 824 | | 2003 | 811 | | 2002 | 796 | | 2001 | 776 | | 2000 | 750 | | 1999 | 711 | | 1998 | 665 | | 1997 | 625 | | 1996 | 590 | | 1995 | 553 | | 1994 | 508 | | 1993 | 464 | | 1992 | 429 | | 1991 | 403 | | 1990 | 384 | | 1989 | 362 | | 1988 | 338 | | 1987 | 320 | | 1986 | 306 | | 1985 | 286 | | 1984 | 262 | | 1983 | 239 | | 1982 | 218 | | 1981 | 200 | | 1980 | 192 | | 1979 | 191 | | 1978 | 190 | | 1977 | 190 | | 1976 | 192 | | 1975 | 194 |
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