Year | Value | 2014 | 562.27769012266 | 2013 | 581.10471667141 | 2012 | 564.78560118409 | 2011 | 524.85859192169 | 2010 | 503.77971403756 | 2009 | 475.33730666569 | 2008 | 470.13367690248 | 2007 | 457.07025988448 | 2006 | 423.52261225565 | 2005 | 411.20667434448 | 2004 | 390.99755060271 | 2003 | 365.20333597467 | 2002 | 349.68585318214 | 2001 | 340.4737823633 | 2000 | 341.19153923059 | 1999 | 324.95834552835 | 1998 | 337.11578449678 | 1997 | 344.97816772271 | 1996 | 306.50044852964 | 1995 | 286.74721708014 | 1994 | 274.79536285528 | 1993 | 287.40653488676 | 1992 | 297.70697863105 | 1991 | 295.10393227723 | 1990 | 302.28344631512 | 1989 | 317.47592353165 | 1988 | 288.5980704095 | 1987 | 293.03839716369 | 1986 | 279.59378164738 | 1985 | 284.34502584882 | 1984 | 291.4681476478 | 1983 | 288.73433930051 | 1982 | 272.63047745272 | 1981 | 263.41666423852 | 1980 | 255.50137755808 | 1979 | 245.77584434114 | 1978 | 318.99823048677 | 1977 | 329.74844340306 | 1976 | 299.24131131478 | 1975 | 264.9205011022 | 1974 | 256.75183292281 | 1973 | 218.06007051727 | 1972 | 239.70663595553 | 1971 | 220.94800950789 |
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