Year	Percent
1998-01-01	10.800000000000000
1999-01-01	10.800000000000000
2000-01-01	9.400000000000000
2001-01-01	10.100000000000000
2002-01-01	13.000000000000000
2003-01-01	7.700000000000000
2004-01-01	8.900000000000000
2005-01-01	9.400000000000000
2006-01-01	10.000000000000000
2007-01-01	9.500000000000000
2008-01-01	9.700000000000000
2009-01-01	9.200000000000000
2010-01-01	8.969520000000000
2011-01-01	9.460670000000000
2012-01-01	9.524600000000000
2013-01-01	9.115810000000000
2014-01-01	9.082520000000000
2015-01-01	9.057910000000001
2016-01-01	9.104000000000000