Year | Value | 2014 | 608.13909437122 | 2013 | 631.53851330321 | 2012 | 625.65632212577 | 2011 | 653.05855468435 | 2010 | 608.09853775909 | 2009 | 614.813860845 | 2008 | 646.27797086985 | 2007 | 625.6576156211 | 2006 | 575.5822961318 | 2005 | 565.3957446336 | 2004 | 531.5974048295 | 2003 | 533.05518377768 | 2002 | 509.97819344641 | 2001 | 489.18806626809 | 2000 | 482.36933326824 | 1999 | 439.22181319101 | 1998 | 437.02684156406 | 1997 | 407.38189668417 | 1996 | 394.54200165647 | 1995 | 347.50703271658 | 1994 | 298.9597968064 | 1993 | 335.46540640342 | 1992 | 322.37097396447 | 1991 | 345.0142364073 | 1990 | 360.75907033001 | 1989 | 324.80774068132 | 1988 | 330.67440416867 | 1987 | 319.00240500261 | 1986 | 272.83389376486 | 1985 | 275.77134498699 | 1984 | 232.28972676393 | 1983 | 225.48301216303 | 1982 | 215.40738018058 | 1981 | 218.44396026835 | 1980 | 205.13553503318 | 1979 | 200.39664338353 | 1978 | 176.88307240264 | 1977 | 176.68655746585 | 1976 | 158.3296699606 | 1975 | 151.93566344672 | 1974 | 144.74553002529 | 1973 | 139.82272710116 | 1972 | 123.81508791717 | 1971 | 123.45244169052 |
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