Year	Percent
1981-01-01	10.49920
1982-01-01	8.04167
1983-01-01	7.08333
1984-01-01	6.56250
1985-01-01	5.85417
1986-01-01	5.10417
1987-01-01	4.33333
1988-01-01	4.37500
1989-01-01	5.95833
1990-01-01	6.87500
1991-01-01	6.62500
1992-01-01	6.75000
1993-01-01	4.67000
1994-01-01	4.23000
1995-01-01	4.59000
1996-01-01	4.49000
1997-01-01	4.22000
1998-01-01	4.50000
1999-01-01	4.29000
2000-01-01	4.76000
2001-01-01	5.14000
2002-01-01	5.32000
2003-01-01	5.24000