Year	% change from 1990
1991	-0.117581440221892
1992	-1.70762276600647
1993	-4.1101819928116
1994	-1.15610982020375
1995	-3.02104621639722
1996	-4.85292629194223
1997	-8.09998298730076
1998	-8.31587198697559
1999	-12.5540799252303
2000	-11.5244885961077
2001	-12.6251456308589
2002	-14.4408744096701
2003	-15.0698059044834
2004	-14.5214155427159
2005	-15.7292095124677
2006	-15.2096761341979
2007	-15.3822796586262
2008	-14.1594111452562
2009	-15.7931686475335
2010	-15.1938478633988
2011	-16.4685672352954
2012	-17.1439658230572