Year	Percent
1999-01-01	0.24
2000-01-01	0.24
2001-01-01	0.24
2002-01-01	0.24
2003-01-01	0.24
2004-01-01	0.24
2005-01-01	2.70
2006-01-01	3.10
2007-01-01	2.57
2008-01-01	4.23
2009-01-01	4.43
2010-01-01	4.19
2011-01-01	3.70
2012-01-01	4.00
2013-01-01	4.53
2014-01-01	4.43