Year	% change from 1990
1991	-1.0740611936274
1992	-2.57932650717211
1993	-4.06616910600181
1994	-3.70955550266758
1995	-5.23955298853069
1996	-5.80211909644743
1997	-6.8741607576689
1998	-7.87913709625598
1999	-9.58763535192015
2000	-10.6936066552882
2001	-11.5534774353743
2002	-12.3891696736388
2003	-13.1272348555855
2004	-14.1084555375647
2005	-15.761675850314
2006	-16.1965859065613
2007	-15.3045076448547
2008	-16.2155534566349
2009	-17.3360779167474
2010	-17.7215023323648
2011	-18.5331135997052
2012	-19.6633330982062