Year Percent 2000-01-01 9.9000 2001-01-01 17.9000 2002-01-01 11.0000 2003-01-01 8.4000 2004-01-01 6.1000 2005-01-01 5.3000 2006-01-01 4.0000 2007-01-01 3.0000 2008-01-01 3.1000 2009-01-01 5.9000 2010-01-01 11.4218 2011-01-01 11.7997 2012-01-01 13.4657 2013-01-01 15.1199 2014-01-01 14.1653 2015-01-01 13.7084 2016-01-01 11.7777