Year	Percent
1973-01-01	0.0780316
1974-01-01	0.0971145
1975-01-01	0.1277637
1976-01-01	0.1360277
1977-01-01	0.1266862
1978-01-01	0.1103990
1979-01-01	0.0749365
1980-01-01	0.0661281