Year	% change from 1990
1991	2.64489257732365
1992	5.92373881279056
1993	8.67021111038802
1994	9.61484591856079
1995	10.0372930560782
1996	10.5698084698812
1997	9.84545169021296
1998	12.863840732053
1999	15.5216076193279
2000	19.0705314119015
2001	19.2100266823611
2002	18.8271928062317
2003	21.4710950520207
2004	21.5050492760676
2005	24.7178262505765
2006	25.9513549150154
2007	28.8712767071193
2008	31.8292555253426
2009	34.6454754581698
2010	37.393221039169
2011	38.7671532495607
2012	40.1410854599524