Year Percent 1995-01-01 0.3820760000000000 1996-01-01 0.6105610000000000 1997-01-01 6.1306800000000000 1998-01-01 6.4126900000000004 1999-01-01 6.2342000000000000 2000-01-01 6.0696800000000000 2001-01-01 6.1731099999999990 2002-01-01 5.5246300000000000 2003-01-01 4.3062600000000000 2004-01-01 3.5898300000000000 2005-01-01 5.9278400000000000 2006-01-01 5.5092200000000000 2007-01-01 4.6542400000000000 2008-01-01 3.5824000000000000 2009-01-01 6.2009900000000000 2010-01-01 5.4958100000000000 2011-01-01 4.4022500000000000 2012-01-01 4.4021400000000000 2013-01-01 1.9135300000000000 2014-01-01 6.9440300000000010 2015-01-01 8.3369300000000000 2016-01-01 11.7986000000000000