Year	Percent
1998-01-01	9.3000
1999-01-01	10.3000
2000-01-01	9.5000
2001-01-01	7.3000
2002-01-01	10.2000
2003-01-01	8.9000
2004-01-01	7.5000
2005-01-01	6.2000
2006-01-01	5.2000
2007-01-01	4.8000
2008-01-01	4.9000
2009-01-01	7.7000
2010-01-01	11.0923
2011-01-01	12.2729
2012-01-01	13.7596
2013-01-01	15.4304
2014-01-01	16.7061
2015-01-01	16.3303
2016-01-01	13.6094