Year	% change from 1990
1991	-5.5548259234093
1992	-10.7857529765721
1993	-20.1655910043201
1994	-21.3467645479092
1995	-23.5366345055566
1996	-24.6698196510574
1997	-25.9559689563071
1998	-30.8769154174822
1999	-33.0529811811188
2000	-29.6564147519147
2001	-30.1517959370492
2002	-30.4762150314667
2003	-30.0196544342494
2004	-30.679937554846
2005	-30.9882935871419
2006	-31.0127167429586
2007	-32.4235464411875
2008	-33.2885742800257
2009	-33.7768776784129
2010	-33.6303569969923
2011	-34.1609337384331
2012	-34.5449437084171