Year	Percent
2003-01-01	29.7418
2004-01-01	27.0591
2005-01-01	21.8406
2006-01-01	20.1249
2007-01-01	16.9595
2008-01-01	17.8259
2009-01-01	17.3679
2010-01-01	15.6245
2011-01-01	14.5923
2012-01-01	15.7141
2013-01-01	17.2723
2014-01-01	19.5661
2015-01-01	21.4707
2016-01-01	22.7502
2017-01-01	22.9091