Year	Percent
2003-01-01	15.45
2004-01-01	14.96
2005-01-01	15.36
2006-01-01	15.17
2007-01-01	18.02
2008-01-01	16.10
2009-01-01	17.57
2010-01-01	18.10
2011-01-01	18.37
2012-01-01	18.27
2013-01-01	18.08
2014-01-01	18.49