Year Percent 1999-01-01 1.076090000000000000 2000-01-01 0.025689999999999998 2001-01-01 0.405234000000000040 2002-01-01 0.355976000000000000 2003-01-01 0.362939000000000000 2004-01-01 0.297909000000000030 2005-01-01 0.359398000000000000 2006-01-01 0.415821000000000000 2007-01-01 0.295620000000000000 2008-01-01 0.203224000000000000 2009-01-01 0.170413000000000000 2010-01-01 0.161951000000000000 2011-01-01 0.088564000000000000 2012-01-01 0.081271000000000010 2013-01-01 0.116783000000000000 2014-01-01 0.256907999999999970