Year	% change from 1990
1991	0.756252062382656
1992	1.4905955349753
1993	1.99016547747202
1994	2.75642516728967
1995	3.45885242265727
1996	3.86537847765054
1997	4.30571408478893
1998	5.02653373652351
1999	5.91991734240691
2000	7.05591829448391
2001	7.898452333941
2002	8.76857496794854
2003	9.58784803552977
2004	10.5694069534077
2005	11.3570342801811
2006	12.3396751037277
2007	13.3547730973336
2008	14.4042215959191
2009	14.8039857404833
2010	15.9237581075306
2011	17.0829956886059
2012	18.2422332696812