Year	% change from 1990
1991	2.81352788710982
1992	-41.3156367053822
1993	-66.1830315270857
1994	-75.3030218468266
1995	-72.8653767477728
1996	-75.7692874710301
1997	-72.8281032698671
1998	-72.757522360589
1999	-74.1648635402191
2000	-72.2291412822638
2001	-72.1129192971075
2002	-73.8768253670536
2003	-71.7998198182359
2004	-69.1326455989746
2005	-66.0256994154198
2006	-64.6440020747987
2007	-62.2978203654759
2008	-49.5753131654314
2009	-54.5688347914327
2010	-53.9301343518405
2011	-49.7865831199415
2012	-50.184265444283