Quarter	Millions of US Dollars
1972-10-01	0
1973-01-01	0
1973-04-01	0
1973-07-01	0
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
1974-10-01	0
1975-01-01	0
1975-04-01	0
1975-07-01	0
1975-10-01	0
1976-01-01	0
1976-04-01	0
1976-07-01	0
1976-10-01	0
1977-01-01	0
1977-04-01	0
1977-07-01	0
1977-10-01	0
1978-01-01	0
1978-04-01	0
1978-07-01	0
1978-10-01	0
1979-01-01	0
1979-04-01	0
1979-07-01	0
1979-10-01	20
1980-01-01	20
1980-04-01	20
1980-07-01	20
1980-10-01	30
1981-01-01	30
1981-04-01	30
1981-07-01	30
1981-10-01	0
1982-01-01	0
1982-04-01	0
1982-07-01	0
1982-10-01	0
1983-01-01	30
1983-04-01	30
1983-07-01	49
1983-10-01	48
1984-01-01	19
1984-04-01	40
1984-07-01	20
1984-10-01	38
1985-01-01	39
1985-04-01	20
1985-07-01	22
1985-10-01	0
1986-01-01	0
1986-04-01	0
1986-07-01	30
1986-10-01	31
1987-01-01	102
1987-04-01	101
1987-07-01	68
1987-10-01	82
2002-07-01	0
2002-10-01	0
2003-01-01	0
2003-04-01	0
2003-07-01	0
2003-10-01	0
2004-01-01	0
2004-04-01	0
2004-07-01	0
2004-10-01	0
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	0
2006-01-01	0
2006-04-01	0
2006-07-01	791
2006-10-01	823
2007-01-01	832
2007-04-01	1351
2007-07-01	532
2007-10-01	552
2008-01-01	593