Year Percent 1996-01-01 11.6089000000000000 1997-01-01 12.0436000000000000 1998-01-01 7.1178300000000005 1999-01-01 9.8344899999999990 2000-01-01 13.3500000000000000 2001-01-01 12.7568000000000000 2002-01-01 9.6290500000000000 2003-01-01 12.1693000000000000 2004-01-01 13.0501000000000000 2005-01-01 12.3415000000000000 2006-01-01 12.3898000000000000 2007-01-01 11.7427000000000000 2008-01-01 9.0074899999999990 2009-01-01 10.4971000000000000 2010-01-01 8.6075800000000000 2011-01-01 10.1580000000000000 2012-01-01 10.9642000000000000 2013-01-01 10.3178000000000000 2014-01-01 8.8262800000000000 2015-01-01 9.0395899999999990 2016-01-01 10.2292000000000000