Year Percent 2003-01-01 2.0000000000000000 2004-01-01 7.2000000000000000 2005-01-01 7.0000000000000000 2006-01-01 7.7000000000000000 2007-01-01 7.5000000000000000 2008-01-01 7.6000000000000000 2009-01-01 8.6000000000000000 2010-01-01 7.8074100000000010 2011-01-01 3.5272699999999997 2012-01-01 10.6708000000000000 2013-01-01 6.7934199999999990 2014-01-01 6.8706900000000000 2015-01-01 6.6302699999999990 2016-01-01 9.6210500000000000