Year	% change from 1990
1991	0.278697218513968
1992	-3.49816213448421
1993	-14.2055117678255
1994	-35.1743686337619
1995	-42.2899255710184
1996	-42.0874860559955
1997	-43.5193753085968
1998	-44.6352614157965
1999	-46.2794652817146
2000	-48.0732585995648
2001	-46.4071100707715
2002	-37.5156812903462
2003	-43.8251376113234
2004	-42.9559460892782
2005	-43.2201964047327
2006	-42.1225975165957
2007	-42.0145200519357
2008	-41.6286597297149
2009	-40.3887862772708
2010	-40.9787319642302
2011	-41.1071838575301
2012	-41.8256728738848