Year	Percent
1998-01-01	2.4000000000000000
1999-01-01	4.6000000000000000
2000-01-01	4.6000000000000000
2001-01-01	3.9000000000000000
2002-01-01	3.3000000000000000
2003-01-01	3.9000000000000000
2004-01-01	4.2000000000000000
2005-01-01	4.8000000000000000
2006-01-01	4.8000000000000000
2007-01-01	5.3000000000000000
2008-01-01	5.0000000000000000
2009-01-01	4.3000000000000000
2010-01-01	5.3000000000000000
2011-01-01	5.1000000000000000
2012-01-01	5.1000000000000000
2013-01-01	5.5990199999999990
2014-01-01	5.5239400000000005
2015-01-01	5.6322700000000000
2016-01-01	5.4727100000000000