Year % change from 1990 1991 -1.36457599752783 1992 1.85443159309975 1993 7.64478650778373 1994 -4.94667509106518 1995 0.502586271489713 1996 3.68811740167314 1997 5.93071036616026 1998 30.8323511388404 1999 7.06582431425391 2000 -7.72882908513717 2001 -8.64153093085541 2002 1.96507463334197 2003 8.62633418688477 2004 20.8124560636152 2005 38.2260200095272 2006 9.37813167454824 2007 49.2773973777624 2008 7.79282040751177 2009 -3.68126663751774 2010 47.6924011405521 2011 66.2621579669025 2012 68.4793777617435