Year	Percent
2008-01-01	67.900000000000000
2009-01-01	57.600000000000000
2010-01-01	45.269300000000000
2011-01-01	41.786400000000000
2012-01-01	38.677400000000000
2013-01-01	29.569000000000003
2014-01-01	31.091800000000000
2015-01-01	37.203100000000000
2016-01-01	41.424100000000000