Year	% change from 1990
1991	-16.5960617093319
1992	32.4827940655712
1993	-23.7464449050419
1994	-11.4536176286505
1995	-10.5032723973352
1996	-23.6938050211467
1997	-27.5029852277805
1998	-26.3420557681227
1999	-40.1476945243649
2000	-37.4094626279157
2001	-50.7365258880764
2002	-44.5197643877695
2003	-45.6698094233722
2004	-40.7148996043515
2005	-42.2967767383553
2006	-33.0035498822435
2007	-34.971758343882
2008	-45.2339342483904
2009	-46.8463158920275
2010	-41.9554027119723
2011	-41.8444110396372
2012	-41.7344293893644