Year	% change from 1990
1991	-17.2490274554489
1992	-24.7168114513123
1993	-29.4306921118877
1994	-30.8775946293642
1995	-28.3412209911982
1996	-26.4673171727966
1997	-32.3401761760523
1998	-40.3735832435008
1999	-47.5813054811842
2000	-46.3652985166105
2001	-44.2987874228003
2002	-45.3410087409555
2003	-42.9276376955782
2004	-43.4317623015755
2005	-43.5544552445573
2006	-41.611559694055
2007	-42.9620530251795
2008	-44.6638223662391
2009	-51.6141504766058
2010	-52.30871375792
2011	-48.9668585336532
2012	-50.7592405588863