Year	Percent
2003-01-01	14.39
2004-01-01	16.65
2005-01-01	19.49
2006-01-01	16.25
2007-01-01	16.39
2008-01-01	12.67
2009-01-01	16.33
2010-01-01	17.93
2011-01-01	15.21
2012-01-01	17.15
2013-01-01	21.85
2014-01-01	23.70
2015-01-01	19.71
2016-01-01	17.54