Year	Percent
2001-01-01	20.477600000000000
2002-01-01	21.142600000000000
2003-01-01	20.117300000000000
2004-01-01	15.972500000000000
2005-01-01	11.928600000000000
2006-01-01	10.177500000000000
2007-01-01	8.503090000000000
2008-01-01	6.786320000000000
2009-01-01	8.772730000000001
2010-01-01	9.275340000000000
2011-01-01	8.567400000000000
2012-01-01	10.035700000000000
2013-01-01	10.070100000000000
2014-01-01	10.850800000000000
2015-01-01	12.330500000000000
2016-01-01	12.542800000000000