Year	Percent
1998-01-01	5.600000000000000
1999-01-01	5.000000000000000
2000-01-01	4.900000000000000
2001-01-01	3.800000000000000
2002-01-01	4.800000000000000
2003-01-01	5.400000000000000
2004-01-01	6.700000000000000
2005-01-01	7.900000000000000
2006-01-01	9.400000000000000
2007-01-01	10.500000000000000
2008-01-01	10.400000000000000
2009-01-01	10.100000000000000
2010-01-01	9.767190000000000
2011-01-01	9.551169999999999
2012-01-01	9.034320000000000
2013-01-01	8.907950000000000
2014-01-01	9.973720000000000
2015-01-01	8.417920000000000
2016-01-01	7.797250000000000