Year	Percent
2004-01-01	0.22
2005-01-01	0.61
2006-01-01	1.18
2007-01-01	1.79
2008-01-01	2.05
2009-01-01	3.59
2010-01-01	4.05
2011-01-01	3.87
2012-01-01	4.29
2013-01-01	4.61
2014-01-01	5.25
2015-01-01	5.83
2016-01-01	6.66