Year	Percent
1991-01-01	4.3000
1992-01-01	4.4250
1993-01-01	4.6000
1994-01-01	7.9250
1995-01-01	19.1750
1996-01-01	17.9500
1997-01-01	15.8750
1998-01-01	11.5000
1999-01-01	11.7250
2000-01-01	13.4750
2001-01-01	12.4000
2002-01-01	12.9000
2003-01-01	12.5000
2004-01-01	11.0000
2005-01-01	9.6000
2006-01-01	8.7000
2007-01-01	6.6000
2008-01-01	5.3000
2009-01-01	5.4000
2010-01-01	5.5893
2011-01-01	5.1000
2012-01-01	4.8000
2013-01-01	4.8000
2014-01-01	5.1000
2015-01-01	5.7000
2016-01-01	5.6000