Year	Percent
1996-01-01	3.2903100000000000
1997-01-01	3.4433100000000000
1998-01-01	2.8607500000000000
1999-01-01	2.5529000000000000
2000-01-01	2.4546300000000000
2001-01-01	2.0767500000000000
2002-01-01	4.0034400000000000
2003-01-01	3.4783400000000000
2004-01-01	2.1545000000000000
2005-01-01	2.6607900000000000
2006-01-01	1.8376599999999998
2007-01-01	3.6267300000000002
2008-01-01	3.2317000000000000
2009-01-01	2.2830600000000000
2010-01-01	2.7310200000000000
2011-01-01	3.1757600000000000
2012-01-01	2.6790500000000000
2013-01-01	2.9764900000000000
2014-01-01	2.8396600000000000
2015-01-01	4.0734500000000000
2016-01-01	2.2856000000000000