Year % change from 1990 1991 -19.1036372573926 1992 -6.64406811125513 1993 -12.7397358801518 1994 -12.6536122383051 1995 -3.95292681787639 1996 -4.46726551418655 1997 -1.95776796680306 1998 4.90330459634925 1999 -7.83450918382338 2000 -14.6943462626451 2001 -30.0342680545797 2002 1.20660408970319 2003 -21.8327545417718 2004 -32.7603440978561 2005 2.93409197581112 2006 -22.8920605021975 2007 -15.4740534303954 2008 -20.2340693937853 2009 -19.3261055387746 2010 -30.0037256416455 2011 -29.453310855689 2012 -28.9371945601602