Year	% change from 1990
1991	4.1704769320005
1992	7.57175927135536
1993	10.8899560534883
1994	13.7362895766817
1995	16.7064676096965
1996	19.4441105926247
1997	22.3385187778585
1998	25.5229425873574
1999	28.7188625116921
2000	31.9100794799576
2001	35.2016261776986
2002	38.2313749875894
2003	41.1095841019183
2004	44.0698336721204
2005	47.0447146612043
2006	49.689343624098
2007	52.9432666732857
2008	56.4767543332515
2009	60.3347459619897
2010	64.5125386034311
2011	66.1576639894654
2012	67.8027893754997