Quarter	Millions of US Dollars
1973-10-01	13
1974-01-01	13
1974-04-01	13
1974-07-01	13
1974-10-01	13
1975-01-01	13
1975-04-01	13
1975-07-01	13
1975-10-01	13
1976-01-01	13
1976-04-01	13
1976-07-01	13
1976-10-01	13
1977-01-01	13
1977-04-01	13
1977-07-01	13
1977-10-01	13
1978-01-01	13
1978-04-01	13
1978-07-01	13