Year	Percent
1980-01-01	6.75000
1981-01-01	6.83333
1982-01-01	6.00000
1983-01-01	6.00000
1984-01-01	5.08333
1985-01-01	5.00000
1986-01-01	5.00000
1987-01-01	6.48750
1988-01-01	5.60000
1989-01-01	7.63000
1990-01-01	8.90000
1991-01-01	8.60000
1992-01-01	9.33000
1993-01-01	9.20000
1994-01-01	9.10000
1995-01-01	6.60000
1996-01-01	8.30000
1997-01-01	7.90000
1998-01-01	7.60000
1999-01-01	6.40000
2000-01-01	5.30000
2001-01-01	5.40000
2002-01-01	4.43000
2003-01-01	4.46000