Year Percent 1995-01-01 9.6700 1996-01-01 10.4242 1997-01-01 10.7900 1998-01-01 11.0217 1999-01-01 11.4450 2000-01-01 10.7442 2001-01-01 12.1567 2002-01-01 13.8042 2003-01-01 13.9783 2004-01-01 14.3571 2005-01-01 14.7517 2006-01-01 13.5800 2007-01-01 11.4946 2008-01-01 11.9117 2009-01-01 14.0942 2010-01-01 14.2192 2011-01-01 13.7608 2012-01-01 13.9042 2013-01-01 15.3200 2014-01-01 15.3200 2015-01-01 15.3200 2016-01-01 15.3200