Year	Percent
1999-01-01	84.0207
2000-01-01	57.8000
2001-01-01	69.0000
2002-01-01	71.3552
2003-01-01	73.9669
2004-01-01	75.6918
2005-01-01	77.0447
2006-01-01	73.8452
2007-01-01	71.9639
2008-01-01	63.2649
2009-01-01	70.9442
2010-01-01	74.0521
2011-01-01	75.1607
2012-01-01	80.0794
2013-01-01	81.1136
2014-01-01	82.8471
2015-01-01	78.8748
2016-01-01	74.5424