Year Percent 1994 -0.7498 1995 -3.42472 1996 -6.86366 1997 -3.53035 1998 -7.01478 1999 -9.6931 2000 -12.53975 2001 -14.44888 2002 -10.64914 2003 -10.94492 2004 -3.73311 2005 -0.97886 2006 7.3291 2007 1.41093 2008 -1.61617 2009 2.38061 2010 6.15095 2011 4.7276 2012 1.0651 2013 -3.63159 2014 -2.4187 2015 -5.58825 2016 -3.30924 2017 -1.14781