Year	Percent
1998-01-01	86.6986
1999-01-01	91.0813
2000-01-01	79.7500
2001-01-01	79.1500
2002-01-01	77.9641
2003-01-01	79.6647
2004-01-01	81.5543
2005-01-01	79.3717
2006-01-01	80.7404
2007-01-01	87.0313
2008-01-01	79.4097
2009-01-01	74.0859
2010-01-01	70.8214
2011-01-01	69.3446
2012-01-01	44.9975
2013-01-01	54.6639
2014-01-01	70.8568
2015-01-01	70.7628
2016-01-01	88.4299