Year % change from 1990 1991 -1.40571887581674 1992 0.0617144872309794 1993 -0.504491443237365 1994 -0.993309365908135 1995 0.109714643966186 1996 -0.669063409186643 1997 0.483919947493705 1998 -1.77698539423802 1999 -3.70453454541892 2000 -2.81036019709452 2001 -3.49509712684776 2002 -6.06339939069188 2003 -0.996248151014367 2004 -0.570124310609998 2005 -1.91706748430199 2006 -2.01600658287864 2007 -4.2116708952519 2008 -4.1009766562503 2009 -8.78677154864179 2010 -15.0283592762752 2011 -14.1786428690379 2012 -13.3289264618007