Year	Percent
2000-01-01	34.54
2001-01-01	29.99
2002-01-01	25.41
2003-01-01	27.54
2004-01-01	24.42
2005-01-01	23.10
2006-01-01	19.37
2007-01-01	15.26
2008-01-01	13.21
2009-01-01	13.93
2010-01-01	13.04
2011-01-01	10.30
2012-01-01	10.07
2013-01-01	11.79
2014-01-01	14.17
2015-01-01	16.35
2016-01-01	16.89