Year	Percent
1998-01-01	13.5000000000000000
1999-01-01	13.6000000000000000
2000-01-01	12.7000000000000000
2001-01-01	15.7000000000000000
2002-01-01	15.3000000000000000
2003-01-01	14.3000000000000000
2004-01-01	12.5000000000000000
2005-01-01	8.3000000000000000
2006-01-01	6.4000000000000000
2007-01-01	2.6000000000000000
2008-01-01	2.3000000000000000
2009-01-01	4.3000000000000000
2010-01-01	5.2669900000000000
2011-01-01	6.0863000000000000
2012-01-01	7.1296500000000000
2013-01-01	6.7355500000000000
2014-01-01	5.6366200000000000
2015-01-01	5.1950600000000000
2016-01-01	5.2984599999999995