Year Percent 2002-01-01 0.000018000000000000 2003-01-01 0.002853000000000000 2004-01-01 0.009134000000000000 2005-01-01 0.008500000000000000 2006-01-01 0.008960000000000000 2007-01-01 0.008458000000000000 2008-01-01 0.007268999999999999 2009-01-01 0.006490000000000001 2010-01-01 0.005705000000000000 2011-01-01 0.005065999999999999 2012-01-01 0.004522000000000000 2013-01-01 0.005541000000000000 2014-01-01 0.004790000000000000 2015-01-01 0.002450000000000000 2016-01-01 0.002070000000000000