Quarterly Millions of US Dollars
1972-07-01 25
1972-10-01 25
1973-01-01 25
1973-04-01 45
1973-07-01 45
1973-10-01 45
1974-01-01 45
1974-04-01 107
1974-07-01 106
1974-10-01 107
1975-01-01 108
1975-04-01 143
1975-07-01 140
1975-10-01 140
1976-01-01 140
1976-04-01 248
1976-07-01 250
1976-10-01 288
1977-01-01 289
1977-04-01 357
1977-07-01 418
1977-10-01 514
1978-01-01 663
1978-04-01 893
1978-07-01 964
1978-10-01 1270
1979-01-01 1324
1979-04-01 1447
1979-07-01 1494
1979-10-01 1491
1980-01-01 1443
1980-04-01 1497
1980-07-01 1491
1980-10-01 1463
1981-01-01 1434
1981-04-01 1343
1981-07-01 1349
1981-10-01 1372
1982-01-01 1341
1982-04-01 1298
1982-07-01 1256
1982-10-01 1262
1983-01-01 1208
1983-04-01 1167
1983-07-01 1141
1983-10-01 1051
1984-01-01 1055
1984-04-01 1044
1984-07-01 1005
1984-10-01 997
1985-01-01 965
1985-04-01 1430
1985-07-01 1451
1985-10-01 1293
1986-01-01 1303
1986-04-01 1295
1986-07-01 1400
1986-10-01 1363
1987-01-01 1394
1987-04-01 1345
1987-07-01 1299
1987-10-01 1334
1988-01-01 1445
1988-04-01 1468
1988-07-01 1557
1988-10-01 1575
1989-01-01 1487
1989-04-01 1499
1989-07-01 1559
1989-10-01 1597
1990-01-01 1551
1990-04-01 1448
1990-07-01 1492
1990-10-01 1486
1991-01-01 1355
1991-04-01 1336
1991-07-01 1370
1991-10-01 1436
1992-01-01 1376
1992-04-01 1413
1992-07-01 1333
1992-10-01 1214
1993-01-01 1173
1993-04-01 684
1993-07-01 607
1993-10-01 570
1994-01-01 517
1994-04-01 445
1994-07-01 352
1994-10-01 348
1995-01-01 398
1995-04-01 220
1995-07-01 101
2012-10-01 275
2013-01-01 275
2013-04-01 275
2013-07-01 275
2013-10-01 325
2014-01-01 325
2014-04-01 824
2014-07-01 805
2014-10-01 797
2015-01-01 771
2015-04-01 779
2015-07-01 779
2015-10-01 774
2016-01-01 783
2016-04-01 778
2016-07-01 779
2016-10-01 575
2017-01-01 575
2017-04-01 325
2017-07-01 325