Quarter	Millions of US Dollars
1972-01-01	0
1972-04-01	0
1972-07-01	0
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	53
1979-01-01	104
1979-04-01	136
1979-07-01	295
1979-10-01	643
1980-01-01	790
1980-04-01	1093
1980-07-01	1052
1980-10-01	729
1981-01-01	1011
1981-04-01	1106
1981-07-01	1103
1981-10-01	1373
1982-01-01	1283
1982-04-01	1330
1982-07-01	1227
1982-10-01	1288
1983-01-01	941
1983-04-01	732
1983-07-01	813
1983-10-01	537
1984-01-01	559
1984-04-01	274
1984-07-01	212
1984-10-01	331
1985-01-01	238
1985-04-01	240
1985-07-01	237
1985-10-01	87
1986-01-01	215
1986-04-01	256
1986-07-01	431
1986-10-01	601
1987-01-01	598
1987-04-01	638
1987-07-01	538
1987-10-01	372
1988-01-01	241
1988-04-01	103
1988-07-01	44
1988-10-01	55
1989-01-01	51
1989-04-01	175
1989-07-01	172
1989-10-01	250
1990-01-01	398
1990-04-01	312
1990-07-01	827
1990-10-01	1200
1991-01-01	992
1991-04-01	1432
1991-07-01	1030
1991-10-01	630
1992-01-01	1113
1992-04-01	1107
1992-07-01	712
1992-10-01	719
1993-01-01	554
1993-04-01	611
1993-07-01	564
1993-10-01	491
1994-01-01	152
1994-04-01	553
1994-07-01	682
1994-10-01	672
1995-01-01	783
1995-04-01	208
1995-07-01	1387
1995-10-01	2382
1996-01-01	4538
1996-04-01	5630
1996-07-01	4345
1996-10-01	3254
1997-01-01	1650
1997-04-01	1858
1997-07-01	1842
1997-10-01	2162
1998-01-01	1685
1998-04-01	378
1998-07-01	368
1998-10-01	40
1999-01-01	0
1999-04-01	0
1999-07-01	0
1999-10-01	0
2000-01-01	0
2000-04-01	0
2000-07-01	0
2000-10-01	0
2001-01-01	0
2001-04-01	0
2001-07-01	0
2001-10-01	200
2002-01-01	670
2002-04-01	699
2002-07-01	675
2002-10-01	475