Quarter	Millions of US Dollars
1976-04-01	59
1976-10-01	38
1977-07-01	30
1977-10-01	44
1978-01-01	43
1978-04-01	190
1978-07-01	51
1978-10-01	87
1979-01-01	50
1979-07-01	25
1983-07-01	-23
1983-10-01	-37
1985-10-01	-68
1986-04-01	-14
1986-07-01	-4
1986-10-01	-41
1987-07-01	-46
1988-01-01	-28
1988-04-01	-20
1988-07-01	-39
1989-01-01	-18
1989-07-01	-18
1990-01-01	-18
1990-04-01	-36
1990-07-01	-18
1991-01-01	-52
1991-07-01	-18
1992-04-01	-18
1992-10-01	-50