Year	Percent
2001-01-01	10.62
2002-01-01	12.23
2003-01-01	14.08
2004-01-01	18.15
2005-01-01	16.69
2006-01-01	17.22
2007-01-01	16.77
2008-01-01	17.10
2009-01-01	18.60
2010-01-01	19.41
2011-01-01	19.47
2012-01-01	21.28
2013-01-01	21.47
2014-01-01	20.88