Year	Percent
1998-01-01	11.2000
1999-01-01	10.2000
2000-01-01	10.2000
2001-01-01	10.2000
2002-01-01	10.2000
2003-01-01	18.1000
2004-01-01	21.7000
2005-01-01	22.7000
2006-01-01	16.9000
2007-01-01	17.8000
2008-01-01	17.6000
2009-01-01	16.0000
2010-01-01	14.1566
2011-01-01	16.0326
2012-01-01	15.9388
2013-01-01	15.5684
2014-01-01	15.1333
2015-01-01	14.5078
2016-01-01	16.2807