Year Percent 1995 0.03266 1996 0.1121 1997 1.04388 1998 0.6368 1999 0.26661 2000 0.20367 2001 0.51006 2002 2.09639 2003 0.38685 2004 0.89784 2005 0.50248 2006 0.50712 2007 0.56891 2008 1.86582 2009 2.20164 2010 0.25417 2011 -0.22226 2012 -0.15411 2013 -0.27453 2014 3.8464 2015 -0.03392 2016 -0.55645 2017 1.17122