Year | Value | 2021 | 1,840.3 | 2020 | 1,840.3 | 2019 | 1,840.3 | 2018 | 1,840.3 | 2017 | 1,840.3 | 2016 | 1,840.3 | 2015 | 1,840.3 | 2014 | 1,837.3 | 2013 | 1,837.3 | 2012 | 1,840.34 | 2011 | 1,903 | 2010 | 1,986 | 2009 | 2,056 | 2008 | 2,106 | 2007 | 2,181 | 2006 | 2,246 | 2005 | 2,301 | 2004 | 2,366 | 2003 | 2,436 | 2002 | 2,500 | 2001 | 2,480 | 2000 | 2,450 | 1999 | 2,430 | 1998 | 2,400 | 1997 | 2,380 | 1996 | 2,350 | 1995 | 2,330 | 1994 | 2,310 | 1993 | 2,300 | 1992 | 2,300 | 1991 | 2,290 | 1990 | 2,320 | 1989 | 2,360 | 1988 | 2,460 | 1987 | 2,560 | 1986 | 2,670 | 1985 | 2,780 | 1984 | 2,900 | 1983 | 2,800 | 1982 | 2,720 | 1981 | 2,650 | 1980 | 2,650 | 1979 | 2,650 | 1978 | 2,650 | 1977 | 2,650 | 1976 | 2,650 | 1975 | 2,640 | 1974 | 2,640 | 1973 | 2,640 | 1972 | 2,640 | 1971 | 2,630 | 1970 | 2,630 | 1969 | 2,630 | 1968 | 2,630 | 1967 | 2,620 | 1966 | 2,620 | 1965 | 2,620 | 1964 | 2,620 | 1963 | 2,610 | 1962 | 2,610 | 1961 | 2,610 |
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