Year	% change from 1990
1991	2.90329421744662
1992	4.97030962816345
1993	7.40562703237664
1994	10.2891276685989
1995	13.2843206560158
1996	16.4626042697582
1997	17.9358122437438
1998	19.3765021914322
1999	21.0780432631132
2000	23.5515340025449
2001	26.6541778594656
2002	28.8979216739714
2003	31.7333521843631
2004	35.561289410434
2005	38.9120599462746
2006	42.0896366464018
2007	45.7818464583628
2008	49.7539940619256
2009	53.3557189311466
2010	57.0627739290259
2011	58.6334016683161
2012	60.2040294076064