Year	Percent
1996-01-01	4.8230500000000000
1997-01-01	4.6350900000000000
1998-01-01	3.7650800000000000
1999-01-01	4.0441699999999990
2000-01-01	4.0282300000000010
2001-01-01	4.1125200000000000
2002-01-01	4.6143000000000000
2003-01-01	4.5262900000000000
2004-01-01	4.4700000000000000
2005-01-01	4.3575500000000000
2006-01-01	4.2991900000000000
2007-01-01	3.7843000000000000
2008-01-01	3.5199100000000000
2009-01-01	3.4709800000000004
2010-01-01	3.7280500000000000
2011-01-01	3.6385099999999997
2012-01-01	3.3773600000000000
2013-01-01	3.1037500000000000
2014-01-01	3.0464300000000000
2015-01-01	2.8279500000000000
2016-01-01	2.7452799999999997