Year	Percent
2005-01-01	62.3460521594510
2006-01-01	63.2934013055140
2007-01-01	63.3874328488876
2008-01-01	63.2128003557440
2009-01-01	63.3048779072045
2010-01-01	63.1381264126257
2011-01-01	63.4274436480412
2012-01-01	64.1720262091258
2013-01-01	64.1151203968436
2014-01-01	63.5898368863944
2015-01-01	63.6087348206306
2016-01-01	63.6148280309229
2017-01-01	63.3904732345785