Year	Percent
2000-01-01	19.81
2001-01-01	22.76
2002-01-01	28.70
2003-01-01	30.15
2004-01-01	30.15
2005-01-01	36.02
2006-01-01	35.00
2007-01-01	37.13
2008-01-01	32.06
2009-01-01	32.49
2010-01-01	32.99
2011-01-01	32.88
2012-01-01	32.43
2013-01-01	32.48
2014-01-01	32.41
2015-01-01	34.09
2016-01-01	33.11