Year	% change from 1990
1991	-10.9488320379644
1992	-25.5587410248928
1993	-29.1445239865131
1994	-37.4535935573054
1995	-50.2183206139389
1996	-30.5848010513469
1997	-47.2943153572045
1998	-52.5819341289434
1999	-52.5689413899675
2000	-50.1222595438058
2001	-55.4030624524753
2002	-53.7997371632804
2003	-52.9717162982196
2004	-53.6462737463604
2005	-53.2098455142036
2006	-54.1371223852113
2007	-53.3915308641449
2008	-52.9421098930122
2009	-50.3152336669556
2010	-49.6720930876499
2011	-47.9178016624399
2012	-46.1635102372298