Year	Percent
1985-01-01	1.9978900000000002
1986-01-01	1.7369800000000000
1987-01-01	1.7831599999999999
1988-01-01	2.3981800000000000
1989-01-01	3.0168900000000000
1990-01-01	4.0351400000000000
1991-01-01	4.3923100000000000
1992-01-01	4.2468500000000000