Year Percent 2002-01-01 0.353303000000000030 2003-01-01 0.385773000000000000 2004-01-01 0.345479000000000000 2005-01-01 0.204328000000000000 2006-01-01 0.116308000000000000 2007-01-01 0.065194000000000000 2008-01-01 0.026499000000000000 2009-01-01 0.018252000000000000 2010-01-01 0.031323000000000004 2011-01-01 0.088080999999999990 2012-01-01 0.117142000000000010 2013-01-01 0.133357000000000000 2014-01-01 0.147825000000000000 2015-01-01 0.123591000000000000