Year	% change from 1990
1991	3.02319885230413
1992	6.80069781507902
1993	3.69652042208815
1994	8.95362728876847
1995	12.4187090421038
1996	15.1864755839703
1997	15.8403023198852
1998	16.3221746237247
1999	18.726037600036
2000	29.7716105232114
2001	31.0207794934342
2002	34.2409261545691
2003	39.9729071795974
2004	42.5592218062213
2005	44.6581655861197
2006	44.2122837448076
2007	47.5928878847105
2008	50.196198007528
2009	53.4033481127501
2010	53.276881626369
2011	54.8096504426327
2012	56.3424192588964