Year	Percent
2004-01-01	5.6685500000000000
2005-01-01	4.7073199999999990
2006-01-01	3.9990600000000000
2007-01-01	3.4702200000000000
2008-01-01	1.3301500000000000
2009-01-01	4.7430900000000005
2010-01-01	12.0424000000000000
2011-01-01	13.2912000000000000
2012-01-01	17.6256000000000000
2013-01-01	20.1635000000000000
2014-01-01	21.1393000000000000
2015-01-01	25.2511000000000000
2016-01-01	32.9935000000000000