Year % change from 1990 1991 2.57281733117296 1992 5.78589837294972 1993 8.1976709354084 1994 10.7704882665813 1995 13.6634407322558 1996 16.0761941032975 1997 18.8080952418585 1998 -16.4151711904481 1999 -81.4296634488647 2000 -13.9774142508175 2001 -87.4845742354538 2002 -7.71971776454213 2003 -40.4743303112121 2004 -80.241183158805 2005 -75.6864405787564 2006 -46.0496253727671 2007 8.00273236022648 2008 -23.0575177830171 2009 -12.3765090343423 2010 -92.7340480305013 2011 -92.7340480305013 2012 -92.7340480305013