Year	Percent
2003-01-01	13.3333333333333
2004-01-01	22.7272727272727
2005-01-01	15.3846153846154
2006-01-01	16.4179104477612
2007-01-01	16.7279996365454
2008-01-01	23.7196493438704
2009-01-01	17.3490474185276
2010-01-01	10.4852377265994
2011-01-01	20.1866486320556
2012-01-01	17.9742779238043
2013-01-01	11.8430364937599
2014-01-01	18.9429162760475
2015-01-01	15.3242579447510
2016-01-01	18.1433965171829
2017-01-01	12.9507922386741