Year	Percent
1998-01-01	27.0000000000000000
1999-01-01	33.7000000000000000
2000-01-01	33.3000000000000000
2001-01-01	13.1000000000000000
2002-01-01	13.1000000000000000
2003-01-01	34.9000000000000000
2004-01-01	29.3000000000000000
2005-01-01	29.3000000000000000
2006-01-01	29.3000000000000000
2007-01-01	10.6000000000000000
2008-01-01	8.8000000000000000
2009-01-01	8.0000000000000000
2010-01-01	6.2914900000000005
2011-01-01	4.4286699999999990
2012-01-01	4.5942300000000005
2013-01-01	5.0464199999999995
2014-01-01	5.4551200000000000
2015-01-01	5.9887600000000000
2016-01-01	11.6613000000000000