Year	Percent
1996-01-01	3.5379000000000000
1997-01-01	4.0658400000000010
1998-01-01	4.6811900000000000
1999-01-01	4.9328500000000000
2000-01-01	4.2890000000000000
2001-01-01	8.0411300000000000
2002-01-01	6.0858500000000000
2003-01-01	6.9070199999999990
2004-01-01	7.3256000000000000
2005-01-01	8.2051000000000000
2006-01-01	6.8280899999999995
2007-01-01	8.7827300000000000
2008-01-01	8.7601000000000000
2009-01-01	9.2498500000000000
2010-01-01	8.0993000000000000
2011-01-01	8.4509600000000000
2012-01-01	8.3899600000000000
2013-01-01	8.4480300000000010
2014-01-01	6.7729700000000000
2015-01-01	6.8380199999999990
2016-01-01	6.1700300000000010