Year	% change from 1990
1991	2.59827140417221
1992	5.30581690995211
1993	8.04068094113395
1994	10.7284366489849
1995	13.3348821001278
1996	15.8350649406521
1997	18.3462182126371
1998	20.598598366051
1999	23.0172558433681
2000	25.4458082196495
2001	27.8898482638755
2002	30.3556140645233
2003	32.6617708427443
2004	34.9918044423794
2005	37.296670581605
2006	39.6277797137363
2007	42.1417293702112
2008	44.8707855259139
2009	47.7177200431934
2010	50.7606165812694
2011	52.2682227470821
2012	53.7758289128948