Year	Percent
2000-01-01	2.72
2001-01-01	4.35
2002-01-01	4.09
2003-01-01	4.48
2004-01-01	4.56
2005-01-01	5.45
2006-01-01	6.48
2007-01-01	7.23
2008-01-01	5.49
2009-01-01	7.90
2010-01-01	9.33
2011-01-01	7.92
2012-01-01	9.46
2013-01-01	9.55
2014-01-01	9.20
2015-01-01	9.19
2016-01-01	8.83