Year	Percent
1996-01-01	7.2698500000000000
1997-01-01	5.8868100000000000
1998-01-01	4.5809100000000000
1999-01-01	4.3742500000000000
2000-01-01	4.3805800000000000
2001-01-01	2.5993600000000000
2002-01-01	3.8471800000000003
2003-01-01	3.6571800000000003
2004-01-01	5.9982700000000000
2005-01-01	3.6328099999999997
2006-01-01	3.5106200000000000
2007-01-01	3.5620500000000000
2008-01-01	3.2970599999999997
2009-01-01	3.1698900000000000
2010-01-01	3.2860800000000000
2011-01-01	2.9846100000000000
2012-01-01	3.2292900000000000
2013-01-01	2.9010700000000003
2014-01-01	2.6112400000000000
2015-01-01	2.3984300000000000
2016-01-01	2.5901200000000000