Year	Percent
1999-01-01	8.051730000000001
2000-01-01	9.759110000000000
2001-01-01	10.066300000000000
2002-01-01	8.980590000000000
2003-01-01	11.693600000000000
2004-01-01	11.711500000000000
2005-01-01	11.972800000000000
2006-01-01	14.156600000000000
2007-01-01	15.533500000000000
2008-01-01	9.858250000000000
2009-01-01	13.074000000000002
2010-01-01	16.325300000000000
2011-01-01	15.402100000000000
2012-01-01	7.890160000000001
2013-01-01	9.821990000000000
2014-01-01	10.511700000000000
2015-01-01	10.607900000000000