Year	Percent
1998-01-01	10.300000000000000
1999-01-01	10.100000000000000
2000-01-01	9.800000000000000
2001-01-01	10.400000000000000
2002-01-01	9.600000000000000
2003-01-01	10.000000000000000
2004-01-01	10.500000000000000
2005-01-01	10.200000000000000
2006-01-01	10.300000000000000
2007-01-01	10.100000000000000
2008-01-01	11.300000000000000
2009-01-01	12.000000000000000
2010-01-01	11.397000000000000
2011-01-01	11.580000000000000
2012-01-01	11.923000000000000
2013-01-01	11.600999999999999
2014-01-01	12.210000000000000
2015-01-01	13.796000000000000
2016-01-01	13.648000000000000