Year % change from 1990 1991 -13.3038988470291 1992 2.37285906702411 1993 -20.9359097356662 1994 -13.1564526760247 1995 -8.59838384833798 1996 -13.7963021039037 1997 -14.3994979368991 1998 -10.6579623415715 1999 -15.0637945944132 2000 -12.5571921611255 2001 -7.70719433642825 2002 -2.03009002561885 2003 -13.9374450073945 2004 -11.0860402780449 2005 -9.76013741699413 2006 -22.4657696677645 2007 -17.3899612374145 2008 -14.3393032076261 2009 19.2309946214641 2010 -12.2656364767592 2011 -11.3882928415269 2012 -10.5109492062946