| Year | Value | | 2014 | 10,496.513671964 | | 2013 | 10,384.622164916 | | 2012 | 10,305.32898174 | | 2011 | 10,129.957086819 | | 2010 | 9,716.1260805158 | | 2009 | 8,877.574933071 | | 2008 | 8,772.2874632135 | | 2007 | 8,462.206542576 | | 2006 | 8,039.7962834858 | | 2005 | 7,796.3146743207 | | 2004 | 7,390.7941470371 | | 2003 | 6,977.317662348 | | 2002 | 6,673.9377042618 | | 2001 | 6,309.2034049112 | | 2000 | 5,906.9593330394 | | 1999 | 4,878.8333840269 | | 1998 | 4,436.1744070404 | | 1997 | 4,651.6288828857 | | 1996 | 4,280.7109400723 | | 1995 | 3,881.0244368132 | | 1994 | 3,495.4887308995 | | 1993 | 3,091.3711956123 | | 1992 | 2,826.188794806 | | 1991 | 2,588.8480760123 | | 1990 | 2,373.2144062218 | | 1989 | 2,095.1947132465 | | 1988 | 1,920.5235571526 | | 1987 | 1,674.2472494509 | | 1986 | 1,480.0185006559 | | 1985 | 1,340.1299581745 | | 1984 | 1,250.2364750385 | | 1983 | 1,140.7050938574 | | 1982 | 1,027.8604026125 | | 1981 | 971.79348178644 | | 1980 | 913.62935595963 | | 1979 | 880.55608751434 | | 1978 | 779.51407368055 | | 1977 | 659.23693132953 | | 1976 | 577.9317602569 | | 1975 | 501.71871468061 | | 1974 | 458.94955377086 | | 1973 | 397.08943006993 | | 1972 | 343.5863454393 | | 1971 | 295.59612859088 |
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