Year	Percent
2005-01-01	68.4069372007656
2006-01-01	68.1674946942988
2007-01-01	67.8829866697694
2008-01-01	65.8121780121104
2009-01-01	66.6914270244962
2010-01-01	62.5119626619534
2011-01-01	61.5752113958725
2012-01-01	62.8782031921530
2013-01-01	63.7287538200444
2014-01-01	63.9940150762769
2015-01-01	64.2646334977850
2016-01-01	65.4262163119116
2017-01-01	65.9516072322611