Quarterly Millions of US Dollars
1988-07-01 -1219
1988-10-01 -1610
1989-01-01 -463
1989-04-01 -348
1989-07-01 319
1989-10-01 922
1990-01-01 271
1990-04-01 77
1990-07-01 929
1990-10-01 -257
1991-01-01 205
1991-04-01 -1034
1991-07-01 1025
1991-10-01 94
1992-01-01 131
1992-04-01 851
1992-07-01 58
1992-10-01 -534
1993-01-01 -176
1993-04-01 -721
1993-07-01 -2585
1993-10-01 -895
1994-01-01 -616
1994-04-01 -1121
1994-07-01 156
1994-10-01 870
1995-01-01 -885
1995-04-01 369
1995-07-01 -865
1995-10-01 531
1996-01-01 1548
1996-04-01 1321
1996-07-01 -207
1996-10-01 215
1997-01-01 -87
1997-04-01 285
1997-07-01 222
1997-10-01 1878
1998-01-01 469
1998-04-01 -648
1998-07-01 48
1998-10-01 -842
1999-01-01 2429
1999-04-01 726
1999-07-01 536
1999-10-01 425
2000-01-01 2955
2000-04-01 502
2000-07-01 241
2000-10-01 2790
2001-01-01 -276
2001-04-01 -118
2001-07-01 500
2001-10-01 1482
2002-01-01 579
2002-04-01 1576
2002-07-01 -515
2002-10-01 844
2003-01-01 1438
2003-04-01 1043
2003-07-01 -4230
2003-10-01 987
2004-01-01 279
2004-04-01 2243
2004-07-01 849
2004-10-01 -703
2005-01-01 1662
2005-04-01 -608
2005-07-01 -1183
2005-10-01 4248
2006-01-01 1676
2006-04-01 -257
2006-07-01 46
2006-10-01 1505
2007-01-01 96
2007-04-01 -47
2007-07-01 -4028
2007-10-01 -2672
2008-01-01 -609
2008-04-01 -2308
2008-07-01 -110
2008-10-01 -1927
2009-01-01 -243
2009-04-01 -655
2009-07-01 136
2009-10-01 -351
2010-01-01 -85
2010-04-01 -270
2010-07-01 856
2010-10-01 -1112
2011-01-01 1125
2011-04-01 -592
2011-07-01 -195
2011-10-01 -453
2012-01-01 3267
2012-04-01 1461
2012-07-01 686
2012-10-01 2373
2013-01-01 810
2013-04-01 -617
2013-07-01 1683
2013-10-01 1189
2014-01-01 920
2014-04-01 322
2014-07-01 -1188
2014-10-01 901
2015-01-01 1684
2015-04-01 136
2015-07-01 217
2015-10-01 -1601
2016-01-01 465
2016-04-01 -416
2016-07-01 -1217
2016-10-01 -1575
2017-01-01 107
2017-04-01 1482
2017-07-01 1922
2017-10-01 -531
2018-01-01 796