Year	Percent
1998-01-01	6.148010000000000
1999-01-01	1.049180000000000
2000-01-01	16.360900000000000
2001-01-01	9.820770000000000
2002-01-01	9.820770000000000
2003-01-01	9.820770000000000
2004-01-01	9.402210000000000
2005-01-01	6.046090000000000
2006-01-01	7.499940000000000
2007-01-01	9.674310000000000
2008-01-01	8.016500000000000
2009-01-01	6.608230000000001
2010-01-01	9.461170000000000
2011-01-01	6.413170000000000
2012-01-01	9.656580000000000
2013-01-01	9.093030000000000
2014-01-01	3.427230000000000
2015-01-01	9.818080000000000
2016-01-01	6.413090000000000