Year	Percent
2005-01-01	68.5921746853885
2006-01-01	67.0602337873041
2007-01-01	66.6160844988416
2008-01-01	66.5955959931073
2009-01-01	65.9622184695984
2010-01-01	65.0122077571824
2011-01-01	64.2858437885421
2012-01-01	62.7185963718778
2013-01-01	62.5389952487618
2014-01-01	63.2443984628742
2015-01-01	62.8522563471510
2016-01-01	62.4763514881648
2017-01-01	63.1727290173739