Year	Percent
1997-01-01	13.2620000000000000
1998-01-01	13.2620000000000000
1999-01-01	13.2620000000000000
2000-01-01	13.2620000000000000
2001-01-01	23.7131000000000000
2002-01-01	8.6352300000000000
2003-01-01	5.0648400000000000
2004-01-01	3.9822400000000000
2005-01-01	4.1691000000000000
2006-01-01	4.1967800000000000
2007-01-01	6.6456100000000005
2008-01-01	6.5592900000000000
2009-01-01	5.0868500000000000
2010-01-01	5.9304400000000000
2011-01-01	8.5585000000000000
2012-01-01	7.5213700000000000
2013-01-01	6.6953800000000000
2014-01-01	6.1237200000000000
2015-01-01	6.1807600000000000
2016-01-01	6.2434500000000000