Year	Percent
1996-01-01	5.0576400000000000
1997-01-01	4.8504000000000000
1998-01-01	4.6672400000000005
1999-01-01	3.9243500000000000
2000-01-01	4.7288400000000000
2001-01-01	3.7485500000000000
2002-01-01	3.9715900000000000
2003-01-01	4.0607100000000000
2004-01-01	3.0138300000000000
2005-01-01	2.6410400000000003
2006-01-01	2.5428700000000000
2007-01-01	2.5551600000000000
2008-01-01	2.3908200000000000
2009-01-01	2.1919299999999997
2010-01-01	2.1997800000000000
2011-01-01	2.2338400000000003
2012-01-01	2.0795300000000000
2013-01-01	1.8512500000000000
2014-01-01	2.2999900000000000
2015-01-01	2.2325700000000000
2016-01-01	2.0736200000000000