Year % change from 1990 1991 -15.4702346956987 1992 30.9696680349812 1993 -21.7112105122256 1994 -10.2454287881492 1995 -9.56627922541496 1996 -22.067122523648 1997 -25.7108781010173 1998 414.092896662502 1999 151.684365518472 2000 268.641799036231 2001 216.669641263609 2002 192.695877208638 2003 350.392646796359 2004 273.830983401749 2005 368.1911475995 2006 178.520435480992 2007 257.110030340889 2008 253.578440121364 2009 316.430929859004 2010 319.275388184901 2011 319.275388184901 2012 319.275388184901