Year % change from 1990 1991 -1.76366865417203 1992 -9.23979785626878 1993 -9.07678960991152 1994 -9.87649002537632 1995 -7.12289211943486 1996 -0.176290476628915 1997 6.5072830962507 1998 10.1001662952791 1999 18.233927932646 2000 8.0055490029088 2001 0.458057346907226 2002 10.4942518235029 2003 17.4159053829471 2004 16.9728184824788 2005 17.8978675514995 2006 18.5276168817306 2007 21.9078295434876 2008 22.0366815449198 2009 24.1571600723123 2010 42.0123441078865 2011 43.5287644039078