Year Percent 1999-01-01 0.24153000000000002 2000-01-01 0.23642399999999997 2001-01-01 0.17550700000000000 2002-01-01 0.34866600000000000 2003-01-01 0.28486800000000000 2004-01-01 0.19569000000000000 2005-01-01 0.25551900000000000 2006-01-01 0.25169200000000000 2007-01-01 0.29322800000000004 2008-01-01 0.12936400000000000 2009-01-01 0.26113900000000000 2010-01-01 0.31745600000000000 2011-01-01 0.13646300000000000 2012-01-01 0.15013900000000002 2013-01-01 0.07070000000000000 2014-01-01 0.29020300000000004 2015-01-01 3.38571999999999960