Year	Percent
1996-01-01	3.7703800000000003
1997-01-01	3.2182400000000000
1998-01-01	2.9293400000000003
1999-01-01	3.1352800000000000
2000-01-01	3.6571200000000000
2001-01-01	0.7534750000000000
2002-01-01	3.6798400000000000
2003-01-01	3.2131600000000000
2004-01-01	3.3543800000000004
2005-01-01	3.5373400000000000
2006-01-01	4.4756900000000000
2007-01-01	4.6454900000000010
2008-01-01	4.1444700000000000
2009-01-01	5.5739900000000000
2010-01-01	4.4816600000000000
2011-01-01	5.4939100000000000
2012-01-01	4.5253700000000000
2013-01-01	4.5838700000000000
2014-01-01	4.3633100000000000
2015-01-01	4.8523200000000000
2016-01-01	4.9279600000000000