Year Percent 2000-01-01 8.8000 2001-01-01 6.9000 2002-01-01 8.5000 2003-01-01 9.4000 2004-01-01 9.7000 2005-01-01 11.1000 2006-01-01 11.8000 2007-01-01 11.8000 2008-01-01 12.6000 2009-01-01 13.2000 2010-01-01 13.9000 2011-01-01 13.9367 2012-01-01 14.2202 2013-01-01 14.2711 2014-01-01 14.0460 2015-01-01 13.8938 2016-01-01 13.4624