Quarterly Millions of US Dollars
1971-01-01 15
1972-01-01 73
1972-07-01 28
1972-10-01 20
1973-01-01 50
1973-04-01 49
1973-07-01 10
1974-01-01 15
1974-07-01 8
1974-10-01 41
1975-01-01 160
1975-04-01 202
1975-07-01 231
1975-10-01 521
1976-01-01 494
1976-04-01 268
1976-07-01 244
1976-10-01 341
1977-01-01 814
1977-04-01 857
1977-07-01 184
1977-10-01 792
1978-01-01 854
1978-04-01 768
1978-07-01 250
1978-10-01 733
1979-01-01 652
1979-04-01 410
1979-07-01 496
1979-10-01 199
1980-01-01 340
1980-04-01 60
1980-07-01 -95
1980-10-01 -232
1981-01-01 -242
1981-04-01 -145
1981-07-01 -19
1981-10-01 113
1982-01-01 -509
1982-04-01 -157
1982-07-01 198
1982-10-01 -154
1983-01-01 -178
1983-04-01 -408
1983-07-01 92
1983-10-01 -258
1984-01-01 20
1984-04-01 -108
1984-07-01 172
1984-10-01 315
1985-01-01 19
1985-04-01 186
1985-07-01 824
1985-10-01 -610
1986-01-01 459
1986-04-01 843
1986-07-01 1797
1986-10-01 1162
1987-01-01 1645
1987-04-01 957
1987-07-01 -149
1987-10-01 -265
1988-01-01 1149
1988-04-01 1638
1988-07-01 607
1988-10-01 143
1989-01-01 1240
1989-04-01 93
1989-07-01 -174
1989-10-01 579
1990-01-01 -651
1990-04-01 -252
1990-07-01 -557
1990-10-01 -282
1991-01-01 -746
1991-04-01 -392
1991-07-01 642
1991-10-01 -25
1992-01-01 41
1992-04-01 1159
1992-07-01 -453
1992-10-01 -583
1993-01-01 -440
1993-04-01 314
1993-07-01 -393
1993-10-01 -726
1994-01-01 -488
1994-04-01 -243
1994-07-01 36
1994-10-01 -757
1995-01-01 -278
1995-04-01 -1014
1995-07-01 278
1995-10-01 -102
1996-01-01 1147
1996-04-01 498
1996-07-01 -776
1996-10-01 294
1997-01-01 684
1997-04-01 -197
1997-07-01 3597
1997-10-01 -215
1998-01-01 1769
1998-04-01 3731
1998-07-01 1288
1998-10-01 -95
1999-01-01 2323
1999-04-01 1458
1999-07-01 388
1999-10-01 -565
2000-01-01 3048
2000-04-01 3171
2000-07-01 2179
2000-10-01 72
2001-01-01 1181
2001-04-01 1208
2001-07-01 -1201
2001-10-01 1083
2002-01-01 1291
2002-04-01 1550
2002-07-01 -835
2002-10-01 1692
2003-01-01 3124
2003-04-01 2406
2003-07-01 1985
2003-10-01 2853
2004-01-01 1294
2004-04-01 2555
2004-07-01 -241
2004-10-01 5516
2005-01-01 1295
2005-04-01 2961
2005-07-01 355
2005-10-01 4072
2006-01-01 3926
2006-04-01 8754
2006-07-01 7178
2006-10-01 6427
2007-01-01 7578
2007-04-01 1220
2007-07-01 6871
2007-10-01 9601
2008-01-01 13991
2008-04-01 13004
2008-07-01 1731
2008-10-01 829
2009-01-01 4788
2009-04-01 2423
2009-07-01 2549
2009-10-01 259
2010-01-01 8687
2010-04-01 5064
2010-07-01 4729
2010-10-01 -335
2011-01-01 19536
2011-04-01 4665
2011-07-01 5552
2011-10-01 11137
2012-01-01 18827
2012-04-01 11887
2012-07-01 2297
2012-10-01 1568
2013-01-01 -360
2013-04-01 8253
2013-07-01 3401
2013-10-01 10089
2014-01-01 1357
2014-04-01 -7026
2014-07-01 1549
2014-10-01 2278
2015-01-01 4805
2015-04-01 -7050
2015-07-01 1215
2015-10-01 -5802
2016-01-01 -724
2016-04-01 43
2016-07-01 3208
2016-10-01 -10641
2017-01-01 10290
2017-04-01 -8185
2017-07-01 -4348
2017-10-01 128
2018-01-01 346
2018-04-01 -1457