Year	Percent
1988-01-01	7.0000
1989-01-01	10.3333
1990-01-01	13.0833
1991-01-01	11.0000
1992-01-01	11.0000
1993-01-01	60.0833
1994-01-01	32.8333
1995-01-01	29.4167
1996-01-01	48.2500
1997-01-01	48.2500
1998-01-01	48.2500
1999-01-01	48.2500
2000-01-01	48.2500
2001-01-01	48.2500
2002-01-01	48.2500
2003-01-01	48.2500
2004-01-01	48.2500
2005-01-01	48.2500
2006-01-01	48.2500
2007-01-01	8.1800
2008-01-01	6.8000
2009-01-01	6.3900
2010-01-01	6.5000
2011-01-01	6.3900
2012-01-01	5.5000
2013-01-01	3.6300
2014-01-01	3.6300
2015-01-01	5.2800