Year	Percent
2000-01-01	0.33
2001-01-01	0.25
2002-01-01	0.22
2003-01-01	0.25
2004-01-01	0.17
2005-01-01	0.13
2006-01-01	0.12
2007-01-01	0.10
2008-01-01	0.10
2009-01-01	0.12
2010-01-01	0.11
2011-01-01	0.14
2012-01-01	0.16
2013-01-01	0.21
2014-01-01	0.20
2015-01-01	0.22