Year Percent 2002-01-01 0.0452160000000000000 2003-01-01 0.0882820000000000000 2004-01-01 0.0908559999999999900 2005-01-01 0.0543500000000000000 2006-01-01 0.0042180000000000000 2007-01-01 0.0036550000000000000 2008-01-01 0.0249700000000000000 2009-01-01 0.0199699999999999980 2010-01-01 0.0199500000000000000 2011-01-01 0.0119490000000000000 2012-01-01 0.0054440000000000000 2013-01-01 0.0053260000000000000 2014-01-01 0.0050590000000000000 2015-01-01 0.0038179999999999998 2016-01-01 0.0029340000000000000