Year	Percent
1998-01-01	25.9000
1999-01-01	28.7000
2000-01-01	28.7000
2001-01-01	28.7000
2002-01-01	28.1000
2003-01-01	25.8000
2004-01-01	23.0000
2005-01-01	21.3000
2006-01-01	18.3000
2007-01-01	17.0000
2008-01-01	16.2000
2009-01-01	16.4000
2010-01-01	16.1381
2011-01-01	16.7757
2012-01-01	17.1173
2013-01-01	16.8493
2014-01-01	15.6557
2015-01-01	15.4907
2016-01-01	15.2234