Year	Percent
1999-01-01	0.49138900000000000
2000-01-01	0.49295200000000006
2001-01-01	0.40925100000000003
2002-01-01	0.43729399999999996
2003-01-01	0.38493200000000000
2004-01-01	0.42169500000000000
2005-01-01	0.42013599999999995
2006-01-01	0.41975400000000000
2007-01-01	0.41061600000000000
2008-01-01	0.41899100000000000
2009-01-01	0.38608000000000003
2010-01-01	0.37041900000000000
2011-01-01	0.38412600000000000
2012-01-01	0.38749400000000000
2013-01-01	0.38902600000000004
2014-01-01	0.34803700000000000
2015-01-01	0.54198000000000000