Year	Percent
1996-01-01	1.8810799999999999
1997-01-01	1.9428700000000000
1998-01-01	2.0760099999999997
1999-01-01	1.9467400000000001
2000-01-01	1.9101000000000000
2001-01-01	1.8143599999999998
2002-01-01	1.7869400000000002
2003-01-01	1.8717000000000000
2004-01-01	1.9312200000000002
2005-01-01	2.0730600000000000
2006-01-01	1.9479300000000000
2007-01-01	1.9095200000000000
2008-01-01	1.8763599999999998
2009-01-01	1.8547000000000000
2010-01-01	1.7322799999999998
2011-01-01	1.8252000000000000
2012-01-01	1.6283900000000000
2013-01-01	1.8273500000000000
2014-01-01	2.2156100000000000
2015-01-01	2.6195600000000000
2016-01-01	2.1263799999999997