Year	Percent
2005-01-01	65.6820536803754
2006-01-01	65.0184238245047
2007-01-01	64.8999973693890
2008-01-01	65.8527581038632
2009-01-01	66.6088466919908
2010-01-01	66.7020116090403
2011-01-01	66.7286956033424
2012-01-01	66.2015758626597
2013-01-01	66.9252332826508
2014-01-01	67.9916220213550
2015-01-01	68.4288801181219
2016-01-01	68.8145396237336
2017-01-01	69.2472690748731