Year	Percent
2000-01-01	14.51
2001-01-01	12.37
2002-01-01	12.14
2003-01-01	11.72
2004-01-01	11.02
2005-01-01	9.13
2006-01-01	11.76
2007-01-01	11.08
2008-01-01	7.96
2009-01-01	14.72
2010-01-01	13.48
2011-01-01	14.21
2012-01-01	17.80
2013-01-01	18.31
2014-01-01	20.91
2015-01-01	24.28
2016-01-01	26.79