Year	Percent
1998-01-01	5.900000000000000
1999-01-01	5.600000000000000
2000-01-01	6.300000000000000
2001-01-01	5.900000000000000
2002-01-01	5.600000000000000
2003-01-01	10.900000000000000
2004-01-01	9.600000000000000
2005-01-01	9.200000000000000
2006-01-01	9.400000000000000
2007-01-01	8.000000000000000
2008-01-01	6.200000000000000
2009-01-01	6.400000000000000
2010-01-01	5.524730000000000
2011-01-01	4.353540000000000
2012-01-01	4.417330000000001
2013-01-01	5.010860000000000
2014-01-01	4.342640000000000
2015-01-01	5.601510000000000
2016-01-01	5.634310000000000