Year | Value | 2014 | 1,320.3451300033 | 2013 | 1,317.965575016 | 2012 | 1,177.5699828168 | 2011 | 1,148.5602419957 | 2010 | 1,104.4912690767 | 2009 | 1,076.0953494587 | 2008 | 998.37241833694 | 2007 | 998.41636082016 | 2006 | 970.66110302058 | 2005 | 918.40683793397 | 2004 | 921.55092739991 | 2003 | 885.51018473106 | 2002 | 882.35912102744 | 2001 | 874.99647006774 | 2000 | 854.54251273137 | 1999 | 836.61973283786 | 1998 | 904.16470788032 | 1997 | 928.37740352836 | 1996 | 922.1301490343 | 1995 | 932.02407188126 | 1994 | 922.24323121888 | 1993 | 884.82549411399 | 1992 | 789.7984383117 | 1991 | 883.90974106404 | 1990 | 884.99285904747 | 1989 | 865.73626253351 | 1988 | 819.18365924878 | 1987 | 800.31243946681 | 1986 | 825.86503964055 | 1985 | 771.28825837321 | 1984 | 736.48354534932 | 1983 | 679.97205225001 | 1982 | 676.11271060515 | 1981 | 651.08682593754 | 1980 | 654.90801852599 | 1979 | 624.72333611019 | 1978 | 584.75560807064 | 1977 | 528.02483529037 | 1976 | 483.08447429561 | 1975 | 467.1904663406 | 1974 | 485.54732446523 | 1973 | 444.8499079179 | 1972 | 411.68039809928 | 1971 | 426.38747498121 |
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