Year	Percent
1998-01-01	6.800000000000000
1999-01-01	6.800000000000000
2000-01-01	7.000000000000000
2001-01-01	6.800000000000000
2002-01-01	7.100000000000000
2003-01-01	6.400000000000000
2004-01-01	6.400000000000000
2005-01-01	7.600000000000000
2006-01-01	7.000000000000000
2007-01-01	7.900000000000000
2008-01-01	4.100000000000000
2009-01-01	4.800000000000000
2010-01-01	4.979010000000000
2011-01-01	5.447960000000000
2012-01-01	5.385619999999999
2013-01-01	5.404380000000001
2014-01-01	5.880690000000000
2015-01-01	6.185530000000000
2016-01-01	5.493010000000000