Year	% change from 1990
1991	0.884772419269919
1992	0.7311241357284
1993	2.45146699583079
1994	6.61291854051393
1995	10.1925782699894
1996	13.2741758668612
1997	15.1464406252967
1998	18.1399925765436
1999	23.5478942416421
2000	17.8318328168564
2001	19.1697813533134
2002	18.1348134209186
2003	21.1637562689363
2004	23.567747671538
2005	26.0209410525771
2006	27.1594920974717
2007	27.9285967077834
2008	29.2984833705945
2009	26.4646220511183
2010	25.5271948829943
2011	26.7824668318242
2012	28.0377387806541