Year Percent 1995-01-01 9.7306100000000000 1996-01-01 11.6836000000000000 1997-01-01 15.9608000000000000 1998-01-01 22.0176000000000000 1999-01-01 26.3355000000000000 2000-01-01 15.3881000000000000 2001-01-01 16.2805000000000000 2002-01-01 13.9411000000000000 2003-01-01 10.9652000000000000 2004-01-01 14.1380000000000000 2005-01-01 13.6600000000000000 2006-01-01 13.0868000000000000 2007-01-01 12.5219000000000000 2008-01-01 9.9303000000000000 2009-01-01 9.7461600000000000 2010-01-01 12.1096000000000000 2011-01-01 13.1712000000000000 2012-01-01 7.2852100000000000 2013-01-01 9.1471900000000000 2014-01-01 7.2550300000000005 2015-01-01 10.6835000000000000 2016-01-01 12.9037000000000000