Year	% change from 1990
1991	-1.87767117511591
1992	-3.73928633936228
1993	-5.5836688134677
1994	-7.41184026721266
1995	-9.21728082478801
1996	-11.0059568079616
1997	-12.776539974222
1998	-99.9335878744256
1999	-99.9204490430957
2000	-99.9045101329579
2001	-99.8838326279141
2002	-99.6264996417073
2003	-99.7842325323694
2004	-99.7349838847315
2005	-99.7155407118639
2006	-99.3402935351764
2007	-99.6525748371301
2008	-99.6150250623459
2009	-99.5716292973857
2010	-99.5412896537351
2011	-99.5412896537356
2012	-99.5412896537351