Year	Percent
1998-01-01	11.1000
1999-01-01	10.9000
2000-01-01	10.7000
2001-01-01	11.7000
2002-01-01	12.0000
2003-01-01	12.3000
2004-01-01	12.3000
2005-01-01	12.6000
2006-01-01	11.9000
2007-01-01	13.2000
2008-01-01	11.9000
2009-01-01	14.9000
2010-01-01	13.9055
2011-01-01	13.4776
2012-01-01	14.2316
2013-01-01	14.8881
2014-01-01	17.9478
2015-01-01	20.1111
2016-01-01	22.3669