Year	Percent
1999-01-01	0.16127600000000000
2000-01-01	0.18297100000000000
2001-01-01	0.15281800000000000
2002-01-01	0.19456600000000002
2003-01-01	0.24620900000000000
2004-01-01	0.23612800000000003
2005-01-01	0.23612800000000003
2006-01-01	0.23197399999999999
2007-01-01	0.25423000000000000
2008-01-01	0.21325900000000000
2009-01-01	0.28654400000000000
2010-01-01	0.27386200000000000
2011-01-01	0.25480000000000000
2012-01-01	0.27348600000000000
2013-01-01	0.26120800000000000
2014-01-01	0.27506600000000000
2015-01-01	0.27643100000000000
2016-01-01	0.28832100000000000