Year | Value | 2021 | 11,950 | 2020 | 11,950 | 2019 | 11,970 | 2018 | 12,010 | 2017 | 12,040 | 2016 | 12,080 | 2015 | 12,120 | 2014 | 12,160 | 2013 | 12,187.465 | 2012 | 12,200 | 2011 | 12,210 | 2010 | 12,210.433 | 2009 | 12,240 | 2008 | 12,230 | 2007 | 12,230 | 2006 | 12,230 | 2005 | 12,240 | 2004 | 12,240 | 2003 | 12,240 | 2002 | 12,240 | 2001 | 12,240 | 2000 | 12,230 | 1999 | 12,230 | 1998 | 12,230 | 1997 | 12,230 | 1996 | 12,220 | 1995 | 12,220 | 1994 | 12,220 | 1993 | 12,220 | 1992 | 12,230 | 1991 | 12,270 | 1990 | 12,380 | 1989 | 12,640 | 1988 | 12,850 | 1987 | 13,070 | 1986 | 13,290 | 1985 | 12,840 | 1984 | 12,690 | 1983 | 12,880 | 1982 | 12,860 | 1981 | 12,840 | 1980 | 12,910 | 1979 | 13,400 | 1978 | 13,930 | 1977 | 13,930 | 1976 | 13,710 | 1975 | 13,130 | 1974 | 14,820 | 1973 | 15,130 | 1972 | 15,130 | 1971 | 14,940 | 1970 | 14,940 | 1969 | 14,940 | 1968 | 14,980 | 1967 | 14,970 | 1966 | 14,930 | 1965 | 14,840 | 1964 | 14,770 | 1963 | 14,740 | 1962 | 14,780 | 1961 | 14,680 |
|