Year	Percent
1996-01-01	2.7865500000000000
1997-01-01	2.2728700000000000
1998-01-01	2.8541700000000000
1999-01-01	3.2174500000000000
2000-01-01	3.2594600000000000
2001-01-01	3.3503800000000004
2002-01-01	3.3479099999999997
2003-01-01	3.6986700000000000
2004-01-01	3.5815500000000000
2005-01-01	3.6474000000000000
2006-01-01	4.0728700000000000
2007-01-01	4.2026600000000000
2008-01-01	4.0484200000000000
2009-01-01	3.7220199999999997
2010-01-01	3.2627200000000003
2011-01-01	3.4733699999999996
2012-01-01	3.3938500000000000
2013-01-01	3.1820900000000000
2014-01-01	3.8621199999999996
2015-01-01	3.9252599999999997
2016-01-01	3.6619800000000002