Year Percent 2002-01-01 1.1865200000000000 2003-01-01 0.6085000000000000 2004-01-01 0.5965820000000000 2005-01-01 0.9806889999999999 2006-01-01 3.0912599999999997 2007-01-01 2.4429800000000000 2008-01-01 8.9200100000000010 2009-01-01 14.0256000000000000 2010-01-01 20.9886000000000000 2011-01-01 15.2576000000000000 2012-01-01 16.3160000000000000 2013-01-01 20.6806000000000000 2014-01-01 18.3254000000000000 2015-01-01 24.8467000000000000 2016-01-01 21.2550000000000000