Year | Value | 2021 | 790 | 2020 | 785 | 2019 | 783 | 2018 | 780 | 2017 | 780 | 2016 | 779 | 2015 | 778 | 2014 | 771 | 2013 | 770 | 2012 | 770 | 2011 | 767 | 2010 | 762 | 2009 | 760 | 2008 | 760 | 2007 | 750 | 2006 | 740 | 2005 | 740 | 2004 | 730 | 2003 | 720 | 2002 | 710 | 2001 | 710 | 2000 | 710 | 1999 | 710 | 1998 | 710 | 1997 | 710 | 1996 | 710 | 1995 | 710 | 1994 | 710 | 1993 | 710 | 1992 | 710 | 1991 | 690 | 1990 | 690 | 1989 | 690 | 1988 | 690 | 1987 | 690 | 1986 | 690 | 1985 | 690 | 1984 | 690 | 1983 | 690 | 1982 | 690 | 1981 | 690 | 1980 | 690 | 1979 | 690 | 1978 | 690 | 1977 | 690 | 1976 | 690 | 1975 | 690 | 1974 | 690 |
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