Year	Percent
2000-01-01	75.601
2001-01-01	64.470
2002-01-01	52.910
2003-01-01	57.920
2004-01-01	62.370
2005-01-01	72.140
2006-01-01	76.820
2007-01-01	73.890
2008-01-01	61.930
2009-01-01	73.990
2010-01-01	81.980
2011-01-01	88.680
2012-01-01	95.720
2013-01-01	98.110
2014-01-01	97.890
2015-01-01	98.800
2016-01-01	95.290