Year | Value | 2014 | 1,118.5369536646 | 2013 | 1,031.4231852577 | 2012 | 941.90411633877 | 2011 | 919.04090267983 | 2010 | 908.76947937152 | 2009 | 894.4435641792 | 2008 | 931.88781345743 | 2007 | 921.42467224253 | 2006 | 899.81324881833 | 2005 | 873.58821903887 | 2004 | 875.02028776877 | 2003 | 896.69311766268 | 2002 | 889.17310627743 | 2001 | 866.37736397799 | 2000 | 849.21853826 | 1999 | 872.84930897415 | 1998 | 888.55312142512 | 1997 | 828.94984429644 | 1996 | 821.3099067357 | 1995 | 746.01324106656 | 1994 | 740.66555658273 | 1993 | 838.19070950544 | 1992 | 855.94816501293 | 1991 | 876.24196159387 | 1990 | 888.0723641646 | 1989 | 806.05618974834 | 1988 | 964.03514805516 | 1987 | 975.67335826107 | 1986 | 997.34193607016 | 1985 | 994.76696533027 | 1984 | 944.30519175875 | 1983 | 891.38427169097 | 1982 | 835.88214061817 | 1981 | 767.32596006784 | 1980 | 702.19656697967 | 1979 | 706.66732403162 | 1978 | 606.62655254973 | 1977 | 631.7173935254 | 1976 | 477.41136946335 | 1975 | 375.37311182802 | 1974 | 292.79327869913 | 1973 | 255.0024555792 | 1972 | 210.51312171676 | 1971 | 183.69900917347 |
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