Year	Percent
1999-01-01	64.7475
2000-01-01	59.8000
2001-01-01	62.2000
2002-01-01	64.8999
2003-01-01	66.9391
2004-01-01	63.9639
2005-01-01	63.2037
2006-01-01	63.8585
2007-01-01	62.1007
2008-01-01	63.4110
2009-01-01	61.1004
2010-01-01	63.0183
2011-01-01	62.9193
2012-01-01	63.2432
2013-01-01	63.8481
2014-01-01	63.5937
2015-01-01	64.4919
2016-01-01	64.5836