Quarterly Millions of US Dollars
1971-01-01 25
1972-10-01 30
1973-01-01 52
1973-04-01 20
1973-07-01 72
1974-01-01 23
1974-04-01 59
1974-07-01 16
1974-10-01 36
1975-04-01 34
1975-10-01 38
1976-07-01 20
1977-01-01 30
1977-07-01 57
1978-04-01 83
1979-04-01 39
1979-07-01 13
1979-10-01 67
1980-01-01 116
1980-07-01 12
1980-10-01 95
1981-01-01 100
1981-04-01 100
1981-07-01 -72
1981-10-01 342
1982-01-01 300
1982-04-01 103
1982-07-01 164
1982-10-01 50
1983-01-01 242
1983-04-01 90
1983-07-01 34
1983-10-01 650
1984-01-01 37
1984-04-01 59
1984-07-01 349
1984-10-01 258
1985-01-01 398
1985-04-01 200
1985-07-01 242
1985-10-01 396
1986-01-01 197
1986-04-01 529
1986-07-01 1008
1986-10-01 -3
1987-01-01 -202
1987-04-01 189
1987-07-01 -99
1987-10-01 -345
1988-01-01 233
1988-04-01 200
1988-07-01 -257
1988-10-01 -90
1989-01-01 -268
1989-04-01 250
1989-07-01 1475
1989-10-01 16
1990-01-01 514
1990-04-01 249
1990-07-01 15
1990-10-01 188
1991-01-01 67
1991-04-01 769
1991-07-01 232
1991-10-01 -14
1992-01-01 354
1992-04-01 -261
1992-07-01 452
1992-10-01 973
1993-01-01 1683
1993-04-01 -324
1993-07-01 46
1993-10-01 -7
1994-01-01 -676
1994-04-01 416
1994-07-01 -71
1994-10-01 -191
1995-01-01 936
1995-04-01 527
1995-07-01 708
1995-10-01 2574
1996-01-01 1860
1996-04-01 1161
1996-07-01 1801
1996-10-01 3185
1997-01-01 5406
1997-04-01 3508
1997-07-01 3183
1997-10-01 2574
1998-01-01 2140
1998-04-01 2962
1998-07-01 4315
1998-10-01 -963
1999-01-01 5039
1999-04-01 2245
1999-07-01 2563
1999-10-01 6138
2000-01-01 2878
2000-04-01 4225
2000-07-01 841
2000-10-01 3125
2001-01-01 8596
2001-04-01 6641
2001-07-01 -2106
2001-10-01 7530
2002-01-01 4319
2002-04-01 2162
2002-07-01 756
2002-10-01 6527
2003-01-01 12673
2003-04-01 15348
2003-07-01 10551
2003-10-01 31444
2004-01-01 26296
2004-04-01 20511
2004-07-01 30215
2004-10-01 41595
2005-01-01 34907
2005-04-01 48543
2005-07-01 17290
2005-10-01 50738
2006-01-01 41516
2006-04-01 59795
2006-07-01 80679
2006-10-01 83920
2007-01-01 72348
2007-04-01 91367
2007-07-01 64869
2007-10-01 27011
2008-01-01 41432
2008-04-01 43323
2008-07-01 17252
2008-10-01 52656
2009-01-01 24062
2009-04-01 24357
2009-07-01 41616
2009-10-01 -16233
2010-01-01 11044
2010-04-01 -8370
2010-07-01 -31539
2010-10-01 -7793
2011-01-01 -70684
2011-04-01 -15436
2011-07-01 -30783
2011-10-01 -1632
2012-01-01 23241
2012-04-01 -12130
2012-07-01 -30364
2012-10-01 7894
2013-01-01 -640
2013-04-01 -22487
2013-07-01 -19494
2013-10-01 1142
2014-01-01 -35114
2014-04-01 -4752
2014-07-01 -16799
2014-10-01 -43203
2015-01-01 -27403
2015-04-01 28174
2015-07-01 -8947
2015-10-01 14017
2016-01-01 -6237
2016-04-01 -1174
2016-07-01 2200
2016-10-01 -7041
2017-01-01 1301
2017-04-01 -2478
2017-07-01 14355
2017-10-01 7629
2018-01-01 -5317
2018-04-01 9047