Year % change from 1990 1991 -13.3161417840151 1992 21.0325348396477 1993 -11.141135873559 1994 -8.69327412948346 1995 -2.81100629047228 1996 -15.0284581755468 1997 -16.2709587624151 1998 36.8960022910959 1999 15.3334026365564 2000 10.9550851989166 2001 3.71504344681035 2002 8.07390181323684 2003 18.2588933806866 2004 17.8547517796162 2005 24.3799694864352 2006 18.0756464087524 2007 37.0942655958149 2008 22.8515374831983 2009 15.8757808484673 2010 23.7068251363174 2011 32.7524851143666 2012 33.073307647724