Year % change from 1990 1991 -1.02550134425214 1992 2.22562299505518 1993 6.36330609620479 1994 1.34584804455249 1995 7.06991940287327 1996 7.47961833073865 1997 8.53893320611849 1998 17.2775030286426 1999 12.1011464440919 2000 8.19773861999422 2001 11.4336303526853 2002 16.5455230527246 2003 22.73571074762 2004 34.6594570208955 2005 37.0184429834467 2006 19.9820883938179 2007 21.63957506087 2008 23.8841806439368 2009 27.2454015562482 2010 29.5346815700052 2011 34.4561642179435 2012 36.1717392927547