Year	Percent
1998-01-01	8.200000000000000
1999-01-01	10.800000000000000
2000-01-01	10.500000000000000
2001-01-01	11.700000000000000
2002-01-01	11.200000000000000
2003-01-01	11.100000000000000
2004-01-01	12.100000000000000
2005-01-01	13.000000000000000
2006-01-01	12.800000000000000
2007-01-01	12.300000000000000
2008-01-01	12.300000000000000
2009-01-01	14.400000000000000
2010-01-01	14.316200000000000
2011-01-01	13.971100000000000
2012-01-01	14.302999999999999
2013-01-01	14.474000000000000
2014-01-01	13.996500000000000