Year	% change from 1990
1991	42.3501731717812
1992	36.3020229087953
1993	-17.7835150795964
1994	-25.6075948260284
1995	-34.8512096202661
1996	-51.2196526340905
1997	-56.5497151020668
1998	-61.6605608462725
1999	-67.6554232959456
2000	-71.5845775237683
2001	-79.0281089896725
2002	-86.8822313916577
2003	-85.5201695595807
2004	-81.9220579992006
2005	-85.6436924894845
2006	-83.8222897707081
2007	-83.4964041820302
2008	-86.4342712692864
2009	-86.0031225073554
2010	-86.9319900292397
2011	-86.9319900292412
2012	-86.9319900292405