Year	% change from 1990
1991	-15.561451620506
1992	31.1317313454947
1993	-21.8410006868548
1994	-10.3167200325919
1995	-9.64188349730307
1996	-22.210297940109
1997	-25.8753560534131
1998	-25.4862696376504
1999	-39.3239530514535
2000	-37.9182575436187
2001	-52.7008713628681
2002	-46.5912304801923
2003	-45.9159915961294
2004	-41.7352679743844
2005	-42.8105829511862
2006	-37.1779526339535
2007	-53.4580109492738
2008	-48.0184743742551
2009	-49.881652222514
2010	-44.8382355912002
2011	-44.8382355912002
2012	-44.8382355912002