Year	Percent
1996-01-01	1.9723200000000000
1997-01-01	2.8904700000000000
1998-01-01	3.7087500000000000
1999-01-01	4.3796900000000000
2000-01-01	4.0791699999999995
2001-01-01	4.9843699999999990
2002-01-01	4.0435099999999995
2003-01-01	4.4706600000000000
2004-01-01	3.3272800000000005
2005-01-01	3.6498199999999996
2006-01-01	3.2433700000000000
2007-01-01	3.0400600000000000
2008-01-01	4.0414000000000000
2009-01-01	4.0091700000000000
2010-01-01	4.6022300000000005
2011-01-01	5.2832400000000000
2012-01-01	4.7110699999999990
2013-01-01	5.0479000000000000
2014-01-01	4.7415300000000000
2015-01-01	5.3125700000000000
2016-01-01	4.6157000000000000