Year	Percent
2005-01-01	30.9244418802427
2006-01-01	32.8880024690273
2007-01-01	33.7218049187438
2008-01-01	35.3910740861746
2009-01-01	36.5604041870968
2010-01-01	40.7660148500205
2011-01-01	43.2316604623430
2012-01-01	46.7737319606750
2013-01-01	46.9423946031356
2014-01-01	48.4333640556161
2015-01-01	48.6139050849345
2016-01-01	48.9940683607608
2017-01-01	50.6262818519674