Year Percent 2003-01-01 41.02710 2004-01-01 19.15460 2005-01-01 14.04510 2006-01-01 14.26670 2007-01-01 13.16150 2008-01-01 4.96122 2009-01-01 4.95567 2010-01-01 15.01380 2011-01-01 8.81708 2012-01-01 4.00528