Year Percent 2002-01-01 0.6152550000000000 2003-01-01 0.6974020000000001 2004-01-01 0.2263340000000000 2005-01-01 0.2034700000000000 2006-01-01 0.2473020000000000 2007-01-01 0.2941660000000000 2008-01-01 0.7890080000000000 2009-01-01 0.7639010000000000 2010-01-01 0.6976040000000000 2011-01-01 0.7232430000000001 2012-01-01 0.6740240000000000 2013-01-01 0.5852649999999999