Year	Percent
2008-01-01	4.2828599999999994
2009-01-01	3.8966400000000000
2010-01-01	4.6789400000000000
2011-01-01	5.1884200000000000
2012-01-01	6.4075200000000000
2013-01-01	6.5056900000000000
2014-01-01	5.4956500000000000
2015-01-01	8.9828100000000000
2016-01-01	7.0218600000000000
2017-01-01	7.3080000000000000