Year	Percent
2005-01-01	39.2678838976065
2006-01-01	40.0099787273480
2007-01-01	40.2836538207092
2008-01-01	40.3794829080868
2009-01-01	40.2603956111750
2010-01-01	40.3544599645732
2011-01-01	40.7457544687158
2012-01-01	41.6094496995955
2013-01-01	41.5772205000627
2014-01-01	41.2772688055326
2015-01-01	41.8238763005714
2016-01-01	42.1947896764657
2017-01-01	42.3738653948305