Year	Percent
1998-01-01	22.9000000000000000
1999-01-01	25.2000000000000000
2000-01-01	25.2000000000000000
2001-01-01	25.2000000000000000
2002-01-01	25.2000000000000000
2003-01-01	25.2000000000000000
2004-01-01	25.2000000000000000
2005-01-01	25.2000000000000000
2006-01-01	25.2000000000000000
2007-01-01	25.2000000000000000
2008-01-01	25.2000000000000000
2009-01-01	25.2000000000000000
2010-01-01	7.8437600000000005
2011-01-01	5.3963700000000000
2012-01-01	6.4018900000000000
2013-01-01	5.1151500000000000
2014-01-01	6.5839899999999990
2015-01-01	8.5825000000000000
2016-01-01	9.6081000000000000