Year	Percent
2001-01-01	0.02566600000000000
2002-01-01	0.03821100000000000
2003-01-01	0.04030400000000000
2004-01-01	0.04030400000000000
2005-01-01	0.11458099999999999
2006-01-01	0.13114700000000000
2007-01-01	0.16959200000000002
2008-01-01	0.16751000000000000
2009-01-01	0.16446200000000000
2010-01-01	0.19782100000000000
2011-01-01	0.20395200000000000
2012-01-01	0.21242399999999997
2013-01-01	0.23130000000000000
2014-01-01	0.23487300000000000
2015-01-01	0.23368300000000000