Year	% change from 1990
1991	0.820166000614497
1992	1.33200122963386
1993	1.07623731939717
1994	0.85029203811835
1995	0.594528127881344
1996	1.01414079311373
1997	1.09652628343069
1998	-89.7632954196132
1999	-78.5749462035042
2000	-90.1633569013219
2001	-86.5390716261911
2002	-88.8178296956653
2003	-86.8923455272059
2004	-90.8686750691671
2005	-93.4163848754994
2006	-91.0014755610208
2007	-87.0279434368275
2008	-89.2929910851523
2009	-90.9132800491855
2010	-85.8231171226555
2011	-85.8231171226561
2012	-85.8231171226557