Year Percent 2005-01-01 7.0984300000000005 2006-01-01 5.6167099999999990 2007-01-01 -1.9458500000000000 2008-01-01 15.0635000000000000 2009-01-01 8.7660000000000000 2010-01-01 4.8918599999999990 2011-01-01 4.8918599999999990 2012-01-01 11.3692000000000000 2013-01-01 8.2664800000000000 2014-01-01 6.6412600000000010 2015-01-01 6.6412600000000010 2016-01-01 14.8124000000000000