Year	Percent
1999-01-01	4.1966000000000000
2000-01-01	5.1086599999999995
2001-01-01	5.1133600000000000
2002-01-01	5.4019000000000000
2003-01-01	6.3792300000000010
2004-01-01	6.8418700000000000
2005-01-01	8.3229200000000000
2006-01-01	6.4256600000000000
2007-01-01	6.5263800000000005
2008-01-01	5.6153600000000000
2009-01-01	5.4022800000000000
2010-01-01	5.3807700000000000
2011-01-01	5.0007900000000000
2012-01-01	5.5790100000000000
2013-01-01	4.2246200000000000
2014-01-01	4.0421600000000000
2015-01-01	3.7207199999999996