Year	Percent
1997-01-01	1.0216700000000000
1998-01-01	1.1886900000000000
1999-01-01	5.3193600000000000
2000-01-01	6.6278399999999990
2001-01-01	6.1149900000000000
2002-01-01	5.5363500000000000
2003-01-01	4.8930500000000000
2004-01-01	4.8334500000000000
2005-01-01	5.5017600000000000
2006-01-01	4.3883600000000000
2007-01-01	5.2409900000000000
2008-01-01	5.7553100000000000
2009-01-01	5.8908000000000000
2010-01-01	5.4060500000000000
2011-01-01	5.4963200000000000
2012-01-01	5.4349700000000000
2013-01-01	5.1161400000000010
2014-01-01	5.1001900000000004
2015-01-01	4.5359099999999990
2016-01-01	4.2701300000000000