Year	Percent
2000-01-01	51.2319644294118
2001-01-01	50.6453584085464
2002-01-01	50.1403956363972
2003-01-01	50.9374691811382
2004-01-01	49.8610550274688
2005-01-01	49.7343428329116
2006-01-01	49.4994217219692
2007-01-01	49.5448425382061
2008-01-01	49.8047100706405
2009-01-01	50.7005496028160
2010-01-01	50.4245057084576
2011-01-01	50.1890133804649
2012-01-01	49.8809054658407
2013-01-01	49.6561943407342
2014-01-01	48.5089613962931
2015-01-01	48.1084577905960
2016-01-01	47.8381119481612
2017-01-01	47.3447999454946