Year	Percent
1996-01-01	1.1260600000000000
1997-01-01	1.3344400000000000
1998-01-01	1.9741700000000000
1999-01-01	2.1721300000000000
2000-01-01	3.1905900000000003
2001-01-01	1.9390599999999998
2002-01-01	1.7409700000000001
2003-01-01	1.6052100000000000
2004-01-01	1.1252400000000000
2005-01-01	2.6933599999999998
2006-01-01	2.8729700000000000
2007-01-01	3.4618599999999997
2008-01-01	3.2514900000000000
2009-01-01	3.6955699999999996
2010-01-01	3.4727099999999997
2011-01-01	3.5526500000000000
2012-01-01	3.5474699999999997
2013-01-01	3.4890600000000000
2014-01-01	4.5359700000000000
2015-01-01	4.9194500000000000
2016-01-01	3.7229400000000004