Year	Percent
2001-01-01	3.33
2002-01-01	5.57
2003-01-01	7.38
2004-01-01	6.11
2005-01-01	7.53
2006-01-01	7.86
2007-01-01	8.36
2008-01-01	8.28
2009-01-01	9.67
2010-01-01	7.90
2011-01-01	8.45
2012-01-01	9.14
2013-01-01	10.58
2014-01-01	11.56
2015-01-01	16.56
2016-01-01	17.64