Year	Percent
1999-01-01	10.1000000000000000
2000-01-01	8.9000000000000000
2001-01-01	8.5000000000000000
2002-01-01	6.9000000000000000
2003-01-01	6.9000000000000000
2004-01-01	5.3000000000000000
2005-01-01	6.2000000000000000
2006-01-01	7.0000000000000000
2007-01-01	6.8000000000000000
2008-01-01	6.4000000000000000
2009-01-01	7.0000000000000000
2010-01-01	6.6649800000000000
2011-01-01	5.7311900000000000
2012-01-01	5.7575400000000005
2013-01-01	7.5482900000000000
2014-01-01	8.0615300000000000
2015-01-01	9.9944200000000000
2016-01-01	10.7001000000000000