Quarter	Millions of US Dollars
1973-04-01	19
1973-10-01	18
1974-01-01	16
1975-01-01	25
1977-01-01	25
1983-01-01	-25
1984-01-01	-25
1984-07-01	20
1985-04-01	20
1985-10-01	-49
1987-04-01	-7
1988-04-01	-17
1988-07-01	-3
1991-07-01	-37
1995-04-01	-59