Year	Percent
1996-01-01	10.4713000000000000
1997-01-01	8.8005100000000010
1998-01-01	7.7117400000000000
1999-01-01	5.6213100000000000
2000-01-01	4.7412100000000000
2001-01-01	5.0257900000000000
2002-01-01	4.7412400000000000
2003-01-01	5.3725300000000000
2004-01-01	5.6676800000000010
2005-01-01	5.4579100000000000
2006-01-01	4.5062300000000000
2007-01-01	5.6806600000000000
2008-01-01	6.8953500000000000
2009-01-01	7.9336100000000010
2010-01-01	6.9509300000000005
2011-01-01	5.8568500000000000
2012-01-01	6.1067700000000000
2013-01-01	5.7780800000000000
2014-01-01	7.5677300000000000
2015-01-01	3.8819199999999996
2016-01-01	5.5772900000000005