Year Percent 1995 -10.62767 1996 -9.29349 1997 -10.07588 1998 -11.40228 1999 -9.984 2000 -6.18298 2001 -5.4649 2002 -5.67566 2003 -5.78651 2004 -7.03725 2005 -7.23246 2006 -10.26365 2007 -13.12481 2008 -11.57141 2009 -1.68018 2010 -1.87748 2011 -2.55044 2012 0.8602 2013 1.25072 2014 2.077 2015 -0.47957 2016 1.29278 2017 2.01432