Year	Percent
1965-01-01	0.10463099999999999
1966-01-01	0.09471800000000000
1967-01-01	0.09909400000000000
1968-01-01	0.08996900000000001
1969-01-01	0.09510000000000000
1970-01-01	0.10915599999999999
1971-01-01	0.10322600000000000
1972-01-01	0.12233200000000000
1973-01-01	0.12555100000000000
1974-01-01	0.06046400000000000
1975-01-01	0.04956400000000000
1976-01-01	0.03998800000000000