Year	Percent
1985-01-01	4.5000000000000000
1986-01-01	4.5000000000000000
1987-01-01	4.5000000000000000
1988-01-01	4.5000000000000000
1989-01-01	4.5000000000000000
1990-01-01	4.5000000000000000
1991-01-01	4.5000000000000000
1992-01-01	5.1250000000000000
1993-01-01	2.5000000000000000
1994-01-01	2.8333300000000000
1995-01-01	3.6250000000000000
1996-01-01	4.5000000000000000
1997-01-01	3.5000000000000000
1998-01-01	4.5000000000000000
1999-01-01	4.5816700000000000
2000-01-01	4.8916699999999995
2001-01-01	4.8651700000000000
2002-01-01	4.8672000000000000
2003-01-01	3.6500000000000000
2004-01-01	3.6192200000000000
2005-01-01	3.5365100000000000
2006-01-01	3.4389100000000000
2007-01-01	3.3884400000000000
2008-01-01	3.3248100000000000