Year	Percent
1996-01-01	2.4683700000000000
1997-01-01	1.4378799999999998
1998-01-01	1.3376500000000000
1999-01-01	1.7594900000000002
2000-01-01	1.5821399999999999
2001-01-01	1.6117100000000000
2002-01-01	1.9849400000000001
2003-01-01	1.9609800000000000
2004-01-01	1.4602800000000000
2005-01-01	4.8169800000000000
2006-01-01	2.3882100000000000
2007-01-01	2.5311600000000000
2008-01-01	1.7722700000000000
2009-01-01	2.1265500000000000
2010-01-01	1.8810099999999998
2011-01-01	1.9975599999999998
2012-01-01	2.0767200000000000
2013-01-01	1.8518599999999998
2014-01-01	1.9612000000000000
2015-01-01	2.1173100000000000
2016-01-01	2.2125100000000000