Year	Percent
2005-01-01	72.4964710203769
2006-01-01	73.2738733388455
2007-01-01	73.9360323736728
2008-01-01	75.2773739523732
2009-01-01	75.6208778154520
2010-01-01	77.5727135219276
2011-01-01	78.9761192493322
2012-01-01	78.8720518488296
2013-01-01	79.1744393352024
2014-01-01	79.2599856615946
2015-01-01	79.4136799798626
2016-01-01	79.6331109651589
2017-01-01	79.8916773368004