Year	Percent
2005-01-01	31.5930627992344
2006-01-01	31.8325053057012
2007-01-01	32.1170133302306
2008-01-01	34.1878219878896
2009-01-01	33.3085729755038
2010-01-01	37.4879512315087
2011-01-01	38.4247020042467
2012-01-01	37.1217968078470
2013-01-01	36.2712461782103
2014-01-01	36.0059849245949
2015-01-01	35.7353664960639
2016-01-01	34.5737836880271
2017-01-01	34.0483927584901