Quarterly Millions of US Dollars
1968-07-01 40
1969-01-01 95
1969-04-01 15
1969-07-01 20
1971-10-01 15
1972-01-01 20
1972-04-01 95
1972-07-01 234
1972-10-01 72
1973-01-01 186
1973-04-01 106
1973-07-01 57
1973-10-01 92
1974-01-01 19
1974-04-01 105
1974-07-01 182
1974-10-01 306
1975-01-01 214
1975-04-01 258
1975-07-01 167
1975-10-01 84
1976-01-01 71
1976-04-01 391
1976-07-01 190
1976-10-01 113
1977-01-01 262
1977-04-01 210
1977-07-01 320
1977-10-01 118
1978-01-01 130
1978-04-01 204
1978-07-01 334
1978-10-01 115
1979-01-01 776
1979-04-01 240
1979-07-01 -203
1979-10-01 -61
1980-01-01 152
1980-04-01 815
1980-07-01 734
1980-10-01 921
1981-01-01 370
1981-04-01 410
1981-07-01 335
1981-10-01 935
1982-01-01 134
1982-04-01 410
1982-07-01 241
1982-10-01 1603
1983-01-01 1527
1983-04-01 1120
1983-07-01 577
1983-10-01 2142
1984-01-01 2485
1984-04-01 1560
1984-07-01 1619
1984-10-01 1366
1985-01-01 883
1985-04-01 1031
1985-07-01 419
1985-10-01 -366
1986-01-01 1070
1986-04-01 1790
1986-07-01 1981
1986-10-01 1469
1987-01-01 2760
1987-04-01 2574
1987-07-01 894
1987-10-01 -453
1988-01-01 1951
1988-04-01 2988
1988-07-01 2042
1988-10-01 3828
1989-01-01 1828
1989-04-01 3194
1989-07-01 680
1989-10-01 1794
1990-01-01 3903
1990-04-01 373
1990-07-01 1262
1990-10-01 1708
1991-01-01 3530
1991-04-01 1434
1991-07-01 2064
1991-10-01 2100
1992-01-01 2817
1992-04-01 1844
1992-07-01 1232
1992-10-01 2611
1993-01-01 3853
1993-04-01 3778
1993-07-01 11364
1993-10-01 5857
1994-01-01 5506
1994-04-01 3414
1994-07-01 5597
1994-10-01 5344
1995-01-01 5863
1995-04-01 9196
1995-07-01 5230
1995-10-01 5343
1996-01-01 12222
1996-04-01 10488
1996-07-01 7114
1996-10-01 7093
1997-01-01 13173
1997-04-01 9066
1997-07-01 13053
1997-10-01 5943
1998-01-01 12802
1998-04-01 17689
1998-07-01 15382
1998-10-01 9163
1999-01-01 24102
1999-04-01 42253
1999-07-01 29723
1999-10-01 16319
2000-01-01 14753
2000-04-01 21891
2000-07-01 34642
2000-10-01 32819
2001-01-01 23261
2001-04-01 22369
2001-07-01 14728
2001-10-01 29161
2002-01-01 16425
2002-04-01 18764
2002-07-01 23680
2002-10-01 16653
2003-01-01 22040
2003-04-01 32374
2003-07-01 13339
2003-10-01 41895
2004-01-01 5843
2004-04-01 17988
2004-07-01 242
2004-10-01 23092
2005-01-01 22178
2005-04-01 19433
2005-07-01 -103
2005-10-01 43841
2006-01-01 30844
2006-04-01 56138
2006-07-01 35033
2006-10-01 62510
2007-01-01 69757
2007-04-01 56184
2007-07-01 13944
2007-10-01 30415
2008-01-01 17919
2008-04-01 72236
2008-07-01 15479
2008-10-01 27793
2009-01-01 83720
2009-04-01 64169
2009-07-01 27039
2009-10-01 11058
2010-01-01 64773
2010-04-01 -26223
2010-07-01 69950
2010-10-01 17288
2011-01-01 16544
2011-04-01 23184
2011-07-01 14952
2011-10-01 47372
2012-01-01 47679
2012-04-01 -6216
2012-07-01 32576
2012-10-01 23258
2013-01-01 -745
2013-04-01 28986
2013-07-01 20862
2013-10-01 -18783
2014-01-01 3131
2014-04-01 7643
2014-07-01 -10959
2014-10-01 -4390
2015-01-01 -903
2015-04-01 21775
2015-07-01 -6378
2015-10-01 -23110
2016-01-01 29949
2016-04-01 18751
2016-07-01 36329
2016-10-01 -23156
2017-01-01 50914
2017-04-01 28146
2017-07-01 32577
2017-10-01 -2535
2018-01-01 22079
2018-04-01 20732