Year Percent 2004-01-01 0.000000000000000000 2005-01-01 0.000000000000000000 2006-01-01 0.007847000000000000 2007-01-01 0.007725000000000000 2008-01-01 0.000000000000000000 2009-01-01 0.000000000000000000 2010-01-01 0.053985000000000005 2011-01-01 0.050317000000000000 2012-01-01 0.275219999999999960 2013-01-01 0.896347999999999900 2014-01-01 1.515970000000000000 2015-01-01 1.666950000000000000 2016-01-01 1.544120000000000200 2017-01-01 1.180829999999999800