Year	Percent
1998-01-01	7.0000000000000000
1999-01-01	8.7000000000000000
2000-01-01	8.7000000000000000
2001-01-01	9.0000000000000000
2002-01-01	7.6000000000000000
2003-01-01	14.8000000000000000
2004-01-01	9.5000000000000000
2005-01-01	6.3000000000000000
2006-01-01	4.1000000000000000
2007-01-01	2.7000000000000000
2008-01-01	2.2000000000000000
2009-01-01	2.7000000000000000
2010-01-01	3.0270099999999998
2011-01-01	2.8927500000000000
2012-01-01	3.2333200000000000
2013-01-01	3.5029400000000000
2014-01-01	3.9534599999999998
2015-01-01	3.9254900000000000
2016-01-01	4.2923200000000000