Year % change from 1990 1991 34.0135601784254 1992 46.8543087325604 1993 12.6993900527832 1994 30.5629330851934 1995 5.73794288138503 1996 -4.55635565667782 1997 130.515918139948 1998 8.5417493699854 1999 -20.1407021387336 2000 -40.6708284474975 2001 -42.515254667364 2002 -1.92472295954773 2003 -25.6368187641936 2004 -17.293187099933 2005 -15.5936294753617 2006 20.3116032663861 2007 -17.4479115483605 2008 -37.0428903601243 2009 -32.4037396895432 2010 -38.8260244693811 2011 1.79874673857723 2012 2.14655837293707