Year % change from 1990 1991 1.7702691779161 1992 4.10772505591033 1993 -0.809015708781291 1994 -3.68334545846469 1995 4.57993156036969 1996 11.5316735375744 1997 24.5096057985073 1998 36.7957319537628 1999 45.626869291084 2000 35.7987767089699 2001 42.630614609436 2002 47.6888152399429 2003 63.1550939024062 2004 76.3580147118261 2005 69.7653113464285 2006 78.6833454584647 2007 81.4040902109773 2008 84.6462156117802 2009 86.5121386037238 2010 94.2661601056234 2011 96.2088217066796 2012 98.1514833077358