Year	Percent
1996-01-01	2.8625599999999998
1997-01-01	2.4237599999999997
1998-01-01	1.4509999999999998
1999-01-01	1.5279200000000002
2000-01-01	2.0492300000000000
2001-01-01	1.6886200000000000
2002-01-01	1.2700700000000000
2003-01-01	1.2700700000000000
2004-01-01	1.7124599999999999
2005-01-01	2.3213000000000000
2006-01-01	1.8117900000000002
2007-01-01	1.8490500000000000
2008-01-01	2.1509000000000000
2009-01-01	2.2810799999999998
2010-01-01	2.0095600000000000
2011-01-01	1.6852500000000000
2012-01-01	1.4059500000000000
2013-01-01	1.6485900000000002
2014-01-01	1.6452900000000001
2015-01-01	1.9598900000000001
2016-01-01	1.8854000000000000