Year	Percent
1990-01-01	12.58
1991-01-01	8.50
1992-01-01	5.75
1993-01-01	4.75
1994-01-01	7.05
1995-01-01	7.50
1996-01-01	6.18
1997-01-01	5.00
1998-01-01	4.76
1999-01-01	5.00
2000-01-01	6.25
2001-01-01	4.28
2002-01-01	4.75
2003-01-01	5.23
2004-01-01	5.25
2005-01-01	5.50
2006-01-01	6.25
2007-01-01	6.75
2008-01-01	4.35
2009-01-01	3.74
2010-01-01	4.75
2011-01-01	4.30
2012-01-01	3.03
2013-01-01	2.50
2014-01-01	2.50
2015-01-01	2.00
2016-01-01	1.50
2017-01-01	1.50