Year % change from 1990 1991 -14.3032408384825 1992 27.7849043894345 1993 -10.8575406337913 1994 -9.25601866860316 1995 -3.23651580544452 1996 -19.9899208470336 1997 -22.1710326194879 1998 8.75850352716168 1999 -7.95963493854738 2000 -10.2263610000574 2001 -25.5606677864148 2002 -19.8966745166502 2003 -10.9524818845852 2004 -13.0329920552605 2005 -9.8396476422396 2006 -15.7681603043027 2007 -14.1199618305792 2008 -19.1037809316503 2009 -24.0748907165245 2010 -18.378779732643 2011 -9.1695180378394 2012 -9.1695180378394