Year	Percent
2004-01-01	87.0703
2005-01-01	57.4801
2006-01-01	49.5298
2007-01-01	49.9338
2008-01-01	49.3680
2009-01-01	50.7005
2010-01-01	56.2894
2011-01-01	50.8853
2012-01-01	51.8124
2013-01-01	48.6367
2014-01-01	48.6643
2015-01-01	42.2986
2016-01-01	54.4759