Year	% change from 1990
1991	3.17822740653144
1992	0.840208062271919
1993	3.06533414992789
1994	1.36516170547842
1995	1.90225137376983
1996	7.68661960899419
1997	14.9862975809797
1998	20.0992331725545
1999	29.2105656798855
2000	33.6498107626786
2001	39.4920367919123
2002	43.0961540089807
2003	46.4406167358608
2004	49.1556995571762
2005	51.4951300671433
2006	54.1921499674021
2007	57.7598591092158
2008	61.2649124936145
2009	65.2785499990122
2010	68.2769948944025
2011	69.9597648433465
2012	71.6425347922905