Year Percent 2000-01-01 0.115164000000000020 2001-01-01 0.264673999999999960 2002-01-01 0.158393000000000000 2003-01-01 0.156859000000000000 2004-01-01 0.169947000000000010 2005-01-01 0.134191000000000000 2006-01-01 0.125913000000000000 2007-01-01 0.104749000000000000 2008-01-01 0.093655000000000000 2009-01-01 0.076498000000000000 2010-01-01 0.073621000000000000 2011-01-01 0.055163000000000000 2012-01-01 0.052382000000000005 2013-01-01 0.056152999999999995 2014-01-01 0.068110000000000000 2015-01-01 0.099388000000000000