Year	Percent
2005-01-01	78.1601367527375
2006-01-01	80.0767720969252
2007-01-01	78.3267717569282
2008-01-01	77.2091994760258
2009-01-01	75.8064591191102
2010-01-01	74.9088106498976
2011-01-01	74.6441313041539
2012-01-01	76.1725407588081
2013-01-01	75.5704016598976
2014-01-01	76.2894256260568
2015-01-01	75.8420796964342
2016-01-01	75.8111494164725
2017-01-01	76.4281706648839