Year	Percent
2000-01-01	9.29
2001-01-01	9.11
2002-01-01	3.49
2003-01-01	4.25
2004-01-01	4.39
2005-01-01	6.92
2006-01-01	6.90
2007-01-01	5.37
2008-01-01	8.08
2009-01-01	8.22
2010-01-01	8.55
2011-01-01	8.57
2012-01-01	8.62
2013-01-01	8.52
2014-01-01	8.29
2015-01-01	7.45
2016-01-01	5.74