Year	Percent
1999-01-01	0.27539400000000000
2000-01-01	0.40386300000000000
2001-01-01	0.27363200000000004
2002-01-01	0.27917100000000000
2003-01-01	0.47957900000000000
2004-01-01	0.24937199999999998
2005-01-01	0.16606700000000002
2006-01-01	0.15961400000000000
2007-01-01	0.09367000000000000
2008-01-01	0.07312300000000001
2009-01-01	0.09320099999999999
2010-01-01	0.08172600000000000
2011-01-01	0.07526600000000000
2012-01-01	0.08743100000000000
2013-01-01	0.09146800000000000
2014-01-01	0.09677400000000000