Year Percent 1990 0 1991 0 1992 0 1993 0 1994 1.29822 1995 0 1996 0.0433 1997 0 1998 0.34038 1999 0 2000 -13.19029 2001 0.20234 2002 -0.05291 2003 9.02058 2004 9.17961 2005 37.28813 2006 9.67832 2007 24.50846 2008 14.37148 2009 -16.37755 2010 -27.86886 2011 16.97619 2012 16.50878 2013 7.01255 2014 -25.26904 2015 -0.42961