Year	Percent
1999-01-01	0.969690024852753
2001-01-01	0.937789976596832
2002-01-01	0.931159973144531
2003-01-01	0.944580018520355
2004-01-01	0.952350020408630
2005-01-01	0.941330015659332
2007-01-01	0.951210021972656
2008-01-01	0.932020008563995
2009-01-01	0.957009971141815
2011-01-01	0.929180026054382
2012-01-01	0.977670013904572
2013-01-01	0.951520025730133
2014-01-01	0.964219987392426
2015-01-01	0.974870026111603