Year	Percent
2004-01-01	19.036600000000000
2005-01-01	24.118000000000002
2006-01-01	31.010200000000000
2007-01-01	31.415900000000000
2008-01-01	35.518800000000000
2009-01-01	38.678500000000000
2010-01-01	34.747800000000000
2011-01-01	32.345500000000000
2012-01-01	29.476700000000000
2013-01-01	29.458200000000000
2014-01-01	31.063800000000000
2015-01-01	30.739400000000000
2016-01-01	34.402100000000000
2017-01-01	36.028900000000000