| Year | Value | | 2014 | 2,016.9857771294 | | 2013 | 1,963.586924285 | | 2012 | 1,876.5432788389 | | 2011 | 1,814.6475563793 | | 2010 | 1,693.8918848767 | | 2009 | 1,560.7024260519 | | 2008 | 1,524.8334612282 | | 2007 | 1,482.0670616355 | | 2006 | 1,380.3313614638 | | 2005 | 1,278.3307915376 | | 2004 | 1,207.7169215693 | | 2003 | 1,129.9045703784 | | 2002 | 1,054.9512583486 | | 2001 | 1,009.4505306635 | | 2000 | 989.0223900386 | | 1999 | 948.05269882836 | | 1998 | 929.32133951258 | | 1997 | 923.67073312263 | | 1996 | 906.95036117761 | | 1995 | 886.33086059283 | | 1994 | 870.49357789387 | | 1993 | 869.21215184212 | | 1992 | 873.10801752864 | | 1991 | 881.58739991537 | | 1990 | 876.72357454258 | | 1989 | 498.94433416652 | | 1988 | 479.92539175434 | | 1987 | 455.53956528702 | | 1986 | 433.80950456878 | | 1985 | 410.82400260026 | | 1984 | 390.79852530511 | | 1983 | 368.04079860006 | | 1982 | 352.6684163153 | | 1981 | 337.24646149587 | | 1980 | 328.81474517837 | | 1979 | 312.67960157172 | | 1978 | 292.27255069433 | | 1977 | 271.3127111505 | | 1976 | 255.20409447185 | | 1975 | 241.12059033216 | | 1974 | 222.16588603515 | | 1973 | 214.43518050516 | | 1972 | 200.3189776602 | | 1971 | 187.33091088794 |
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