Year	Percent
1999-01-01	47.499300000000000
2000-01-01	47.573300000000000
2001-01-01	53.804400000000000
2002-01-01	59.793500000000000
2003-01-01	58.653999999999996
2004-01-01	60.954700000000000
2005-01-01	60.900700000000000
2006-01-01	66.543200000000000
2007-01-01	69.291000000000000
2008-01-01	64.175400000000000
2009-01-01	81.681800000000000
2010-01-01	79.642600000000000
2011-01-01	74.308800000000000
2012-01-01	81.744900000000000
2013-01-01	80.822000000000000
2014-01-01	75.702600000000000
2015-01-01	82.365700000000000
2016-01-01	81.706800000000000