Year	% change from 1990
1991	1.83532456655453
1992	2.44867372689903
1993	8.32224760351448
1994	11.9357494714271
1995	15.6315874817577
1996	15.5205989915003
1997	14.7772122524996
1998	12.9297655387822
1999	11.1276588040636
2000	10.9588933266793
2001	12.9159116563104
2002	9.72243431606687
2003	8.44488594948685
2004	9.03729685564096
2005	9.62955033131245
2006	10.1994486784498
2007	10.783200908059
2008	11.3129544821245
2009	10.9187485536074
2010	10.295008981409
2011	11.3979590712231
2012	12.5009091610372