Year	Percent
1996-01-01	3.3065000000000000
1997-01-01	3.1926799999999997
1998-01-01	3.4753199999999995
1999-01-01	3.1941599999999997
2000-01-01	3.2559400000000003
2001-01-01	2.6649500000000000
2002-01-01	2.1889000000000000
2003-01-01	2.1629200000000000
2004-01-01	2.2888500000000000
2005-01-01	3.0632700000000000
2006-01-01	3.5119700000000000
2007-01-01	3.5384800000000003
2008-01-01	3.5597900000000000
2009-01-01	3.5795800000000004
2010-01-01	3.4138599999999997
2011-01-01	3.3441699999999996
2012-01-01	3.0552500000000000
2013-01-01	3.4605200000000000
2014-01-01	3.4877900000000000
2015-01-01	3.9822699999999998
2016-01-01	3.5458100000000000