Year	Percent
1996-01-01	6.1001199999999995
1997-01-01	3.4363500000000000
1998-01-01	5.1302000000000000
1999-01-01	4.5589200000000000
2000-01-01	5.5465700000000000
2001-01-01	5.0336300000000005
2002-01-01	5.3589900000000000
2003-01-01	5.1749100000000000
2004-01-01	5.8778000000000000
2005-01-01	5.2028700000000000
2006-01-01	5.2694600000000000
2007-01-01	5.3222600000000000
2008-01-01	4.9469400000000010
2009-01-01	4.5170200000000000
2010-01-01	4.2871800000000000
2011-01-01	4.1237000000000000
2012-01-01	3.6419000000000000
2013-01-01	3.3281199999999997
2014-01-01	3.4030000000000000
2015-01-01	3.4391400000000000
2016-01-01	3.8760400000000000