Year	% change from 1990
1991	-25.1993799612501
1992	-44.179088954319
1993	-40.157360834298
1994	-35.4295348760786
1995	-34.1869351445972
1996	-31.342545492489
1997	-31.2381244217415
1998	-34.1504517149312
1999	-35.9015614799487
2000	-30.7857691925911
2001	-29.7511460146876
2002	-26.6576025552291
2003	-25.4381755100617
2004	-25.0828440474823
2005	-26.758701868823
2006	-26.5458587123372
2007	-25.364515841614
2008	-25.2692655986226
2009	-25.1373666672148
2010	-24.1157198543544
2011	-23.1544703163743
2012	-22.22473157369