Year	Percent
1998-01-01	11.0000
1999-01-01	13.6000
2000-01-01	20.5000
2001-01-01	23.1000
2002-01-01	20.7000
2003-01-01	16.9000
2004-01-01	20.5000
2005-01-01	18.3000
2006-01-01	17.9000
2007-01-01	19.3000
2008-01-01	20.7000
2009-01-01	20.9000
2010-01-01	20.1587
2011-01-01	20.3224
2012-01-01	21.8886
2013-01-01	22.8829
2014-01-01	22.2207
2015-01-01	20.9694
2016-01-01	19.8282