Year	Percent
1998-01-01	10.500000000000000
1999-01-01	11.600000000000000
2000-01-01	12.100000000000000
2001-01-01	8.900000000000000
2002-01-01	9.200000000000000
2003-01-01	9.600000000000000
2004-01-01	10.100000000000000
2005-01-01	10.500000000000000
2006-01-01	10.700000000000000
2007-01-01	11.300000000000000
2008-01-01	10.400000000000000
2009-01-01	11.500000000000000
2010-01-01	10.332700000000000
2011-01-01	10.081800000000000
2012-01-01	10.141300000000000
2013-01-01	9.265200000000000
2014-01-01	9.034410000000001
2015-01-01	8.460620000000000
2016-01-01	9.272250000000000