Quarterly Millions of US Dollars
1987-07-01 120
1987-10-01 -1934
1988-01-01 394
1988-04-01 756
1988-07-01 1321
1988-10-01 2002
1989-01-01 -347
1989-04-01 8544
1989-07-01 727
1989-10-01 -1129
1990-01-01 6104
1990-04-01 -1577
1990-07-01 -596
1990-10-01 -5888
1991-01-01 -1014
1991-04-01 3769
1991-07-01 -2045
1991-10-01 -428
1992-01-01 -1464
1992-04-01 2774
1992-07-01 3018
1992-10-01 2021
1993-01-01 510
1993-04-01 2410
1993-07-01 -5028
1993-10-01 -1624
1994-01-01 -1197
1994-04-01 -1367
1994-07-01 2776
1994-10-01 2787
1995-01-01 -846
1995-04-01 1097
1995-07-01 -734
1995-10-01 1949
1996-01-01 -1685
1996-04-01 -366
1996-07-01 -881
1996-10-01 234
1997-01-01 313
1997-04-01 -729
1997-07-01 3474
1997-10-01 5137
1998-01-01 -1342
1998-04-01 725
1998-07-01 1637
1998-10-01 -2431
1999-01-01 -1978
1999-04-01 -3389
1999-07-01 -1018
1999-10-01 1983
2000-01-01 -1952
2000-04-01 1292
2000-07-01 568
2000-10-01 3341
2001-01-01 -497
2001-04-01 -348
2001-07-01 -166
2001-10-01 -614
2002-01-01 398
2002-04-01 776
2002-07-01 457
2002-10-01 1243
2003-01-01 -554
2003-04-01 1231
2003-07-01 1529
2003-10-01 4592
2004-01-01 1291
2004-04-01 2253
2004-07-01 848
2004-10-01 3267
2005-01-01 -1042
2005-04-01 2773
2005-07-01 -728
2005-10-01 1142
2006-01-01 2012
2006-04-01 2062
2006-07-01 -2209
2006-10-01 891
2007-01-01 -160
2007-04-01 -265
2007-07-01 -2442
2007-10-01 -1001
2008-01-01 -3
2008-04-01 1393
2008-07-01 -458
2008-10-01 -3199
2009-01-01 -3208
2009-04-01 5
2009-07-01 -791
2009-10-01 1705
2010-01-01 -457
2010-04-01 1620
2010-07-01 -1359
2010-10-01 2452
2011-01-01 307
2011-04-01 1713
2011-07-01 1270
2011-10-01 791
2012-01-01 -677
2012-04-01 1917
2012-07-01 182
2012-10-01 1336
2013-01-01 -184
2013-04-01 426
2013-07-01 -629
2013-10-01 676
2014-01-01 -391
2014-04-01 3094
2014-07-01 -425
2014-10-01 4551
2015-01-01 383
2015-04-01 -6
2015-07-01 1981
2015-10-01 -827
2016-01-01 -756
2016-04-01 2432
2016-07-01 -1250
2016-10-01 -906
2017-01-01 1892
2017-04-01 952
2017-07-01 1204
2017-10-01 399
2018-01-01 998