Year	Percent
1998-01-01	20.2000000000000000
1999-01-01	11.9000000000000000
2000-01-01	9.8000000000000000
2001-01-01	6.5000000000000000
2002-01-01	3.0000000000000000
2003-01-01	7.2000000000000000
2004-01-01	2.2000000000000000
2005-01-01	2.3000000000000000
2006-01-01	2.9000000000000000
2007-01-01	4.1000000000000000
2008-01-01	2.2000000000000000
2009-01-01	4.2000000000000000
2010-01-01	1.8615800000000000
2011-01-01	2.0321300000000000
2012-01-01	4.0558500000000000
2013-01-01	5.7568900000000000
2014-01-01	4.0106000000000000
2015-01-01	5.1269599999999995
2016-01-01	10.4013000000000000