Year	Percent
2009-01-01	2.3211300000000000
2010-01-01	2.3825200000000000
2011-01-01	2.7446900000000003
2012-01-01	3.1540700000000000
2013-01-01	3.3802800000000004
2014-01-01	3.2934300000000003
2015-01-01	4.8864900000000000
2016-01-01	6.7133000000000000