Year	Percent
1983-01-01	2.5000000000000000
1984-01-01	1.5000000000000000
1985-01-01	1.5000000000000000
1986-01-01	2.0000000000000000
1987-01-01	2.0000000000000000
1988-01-01	2.0000000000000000
1989-01-01	2.2500000000000000
1990-01-01	3.1666700000000000
1991-01-01	3.5525000000000000
1992-01-01	4.9116700000000000
1993-01-01	4.1425000000000000
1994-01-01	5.4608300000000005
1995-01-01	4.7141699999999990
1996-01-01	4.5900000000000000
1997-01-01	4.2816700000000000
1998-01-01	4.6658300000000010
1999-01-01	4.7191700000000000
2000-01-01	4.6433300000000010