Year	% change from 1990
1991	-17.9632290820136
1992	-32.0317159853264
1993	-28.110265182539
1994	-25.3694048479642
1995	-23.361742956033
1996	-20.8620216473899
1997	-21.1967008338036
1998	-22.1210103449736
1999	-25.6186405353115
2000	-27.3112096390335
2001	-25.925016576879
2002	-22.6148860581366
2003	-20.4185491619728
2004	-21.6404801678231
2005	-22.9767665806254
2006	-21.4983621634617
2007	-18.3621874702545
2008	-18.5576852072072
2009	-15.8172998969632
2010	-17.37628569169
2011	-16.0262413878893
2012	-16.4858113989437