Year	Percent
1999-01-01	1.4190700000000000
2000-01-01	1.6309500000000000
2001-01-01	1.3670799999999999
2002-01-01	1.4376600000000000
2003-01-01	1.3245799999999999
2004-01-01	1.5563400000000000
2005-01-01	1.9881099999999998
2006-01-01	2.0572900000000000
2007-01-01	1.8640599999999998
2008-01-01	1.8314700000000002
2009-01-01	2.0990700000000000
2010-01-01	2.4461400000000000
2011-01-01	1.9292599999999998
2012-01-01	1.8002099999999999
2013-01-01	2.0133500000000000
2014-01-01	2.7007800000000000
2015-01-01	1.8996800000000000
2016-01-01	1.9075900000000001