Year	% change from 1990
1991	1.90796857463467
1992	4.04040404040402
1993	6.45342312008974
1994	8.64197530864079
1995	11.0549943883271
1996	13.2996632996615
1997	15.6565656565639
1998	17.9012345679011
1999	20.763187429854
2000	23.0078563411884
2001	25.4769921436598
2002	28.1705948372625
2003	31.1447811447815
2004	33.8383838383825
2005	36.3075196408539
2006	38.888888888887
2007	42.0314253647585
2008	44.556677890011
2009	47.1380471380491
2010	50.2805836139195
2011	50.2805836139155
2012	50.2805836139183