Year | Value | 2014 | 481.64010278301 | 2013 | 486.70793036636 | 2012 | 491.8295923552 | 2011 | 506.849114189 | 2010 | 502.70588505572 | 2009 | 488.19308750069 | 2008 | 510.79185886326 | 2007 | 534.24687030108 | 2006 | 524.97741375115 | 2005 | 520.37555643028 | 2004 | 516.16245203135 | 2003 | 508.37167946075 | 2002 | 509.33490916084 | 2001 | 488.842544317 | 2000 | 510.21229906102 | 1999 | 516.71116303355 | 1998 | 528.15829641062 | 1997 | 557.03876150252 | 1996 | 549.78060657335 | 1995 | 502.13076290226 | 1994 | 494.60613341373 | 1993 | 495.03381686193 | 1992 | 494.4100885212 | 1991 | 511.36487311981 | 1990 | 521.16511957063 | 1989 | 530.11936431806 | 1988 | 529.08598559557 | 1987 | 524.1144464063 | 1986 | 526.94957225486 | 1985 | 514.993193167 | 1984 | 496.39566239019 | 1983 | 482.7475884254 | 1982 | 488.36179673922 | 1981 | 476.28255606907 | 1980 | 465.08488875576 | 1979 | 443.01729040834 | 1978 | 419.87421677379 | 1977 | 410.92355135118 | 1976 | 405.47628564735 | 1975 | 390.89262213414 | 1974 | 375.93417230422 | 1973 | 359.6388936633 | 1972 | 342.13181103227 | 1971 | 318.93006149153 |
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