Year	Percent
1996-01-01	4.2159400000000000
1997-01-01	4.1162100000000000
1998-01-01	4.8596800000000000
1999-01-01	4.7157599999999995
2000-01-01	5.1812000000000000
2001-01-01	5.3278500000000000
2002-01-01	6.0573800000000000
2003-01-01	6.6448899999999990
2004-01-01	5.5684600000000000
2005-01-01	6.1371100000000000
2006-01-01	6.6245100000000010
2007-01-01	6.1745600000000000
2008-01-01	5.9141400000000000
2009-01-01	6.3201900000000000
2010-01-01	5.5453700000000000
2011-01-01	6.0715300000000000
2012-01-01	5.4624600000000000
2013-01-01	6.0535900000000000
2014-01-01	4.2540100000000000
2015-01-01	4.5493000000000000
2016-01-01	3.8729600000000000