Year	% change from 1990
1991	8.36235486351791
1992	11.31831120847
1993	10.2903933731484
1994	12.8775759545409
1995	14.8512235346177
1996	16.0111943854862
1997	18.4281204645915
1998	19.0693358810922
1999	21.0810183009929
2000	21.4474880500639
2001	21.7071150174697
2002	24.8571070799042
2003	25.0267633975777
2004	24.9912582614978
2005	25.0639078808878
2006	25.12342040152
2007	25.3193955585396
2008	25.5566420881147
2009	25.6967104883497
2010	26.725221750802
2011	28.3695990967028
2012	29.9552653891779