Year Percent 2004-01-01 14.3764000000000000 2005-01-01 12.6710000000000000 2006-01-01 9.7536399999999990 2007-01-01 8.8612500000000000 2008-01-01 7.6246800000000010 2009-01-01 8.8402400000000000 2010-01-01 7.5605199999999995 2011-01-01 4.0514700000000000 2012-01-01 5.2465300000000000 2013-01-01 5.5924200000000000 2014-01-01 5.6562199999999990 2015-01-01 5.6562199999999990 2016-01-01 6.1967300000000005