Year	Percent
2008-01-01	3.600000000000000
2009-01-01	4.500000000000000
2010-01-01	5.821720000000000
2011-01-01	9.986239999999999
2012-01-01	18.374900000000000
2013-01-01	38.556999999999995
2014-01-01	44.972100000000000
2015-01-01	47.747800000000000
2016-01-01	48.675800000000000