Year	Percent
2008-01-01	3.4732800000000004
2009-01-01	4.8248200000000000
2010-01-01	2.8999099999999998
2011-01-01	3.1871300000000000
2012-01-01	4.0566000000000000
2013-01-01	1.6236600000000000