Year	Percent
2000-01-01	8.32
2001-01-01	8.99
2002-01-01	12.55
2003-01-01	16.90
2004-01-01	19.62
2005-01-01	18.24
2006-01-01	20.90
2007-01-01	20.90
2008-01-01	16.54
2009-01-01	21.03
2010-01-01	17.62
2011-01-01	16.05
2012-01-01	18.20
2013-01-01	15.73
2014-01-01	14.74