Quarterly Millions of US Dollars
1971-01-01 15
1972-01-01 73
1972-07-01 28
1972-10-01 29
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
1976-10-01 301
1977-01-01 761
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
1979-01-01 682
1979-04-01 410
1979-07-01 522
1979-10-01 184
1980-01-01 410
1980-04-01 60
1980-07-01 -95
1980-10-01 -212
1981-01-01 -282
1981-04-01 -145
1981-07-01 -19
1981-10-01 193
1982-01-01 -509
1982-04-01 -157
1982-07-01 198
1982-10-01 -154
1983-01-01 -197
1983-04-01 -408
1983-07-01 66
1983-10-01 -258
1984-01-01 20
1984-04-01 -108
1984-07-01 97
1984-10-01 315
1985-01-01 19
1985-04-01 111
1985-07-01 739
1985-10-01 -731
1986-01-01 367
1986-04-01 736
1986-07-01 1380
1986-10-01 922
1987-01-01 1147
1987-04-01 936
1987-07-01 -224
1987-10-01 -266
1988-01-01 1185
1988-04-01 1549
1988-07-01 608
1988-10-01 127
1989-01-01 1077
1989-04-01 1
1989-07-01 -101
1989-10-01 249
1990-01-01 -436
1990-04-01 -365
1990-07-01 -534
1990-10-01 -284
1991-01-01 -638
1991-04-01 -386
1991-07-01 640
1991-10-01 -27
1992-01-01 704
1992-04-01 1181
1992-07-01 -428
1992-10-01 -584
1993-01-01 -255
1993-04-01 708
1993-07-01 -357
1993-10-01 -680
1994-01-01 -488
1994-04-01 -155
1994-07-01 121
1994-10-01 -772
1995-01-01 -253
1995-04-01 -939
1995-07-01 278
1995-10-01 -202
1996-01-01 997
1996-04-01 598
1996-07-01 -776
1996-10-01 294
1997-01-01 614
1997-04-01 -197
1997-07-01 3461
1997-10-01 -15
1998-01-01 1759
1998-04-01 3091
1998-07-01 858
1998-10-01 18
1999-01-01 1706
1999-04-01 1759
1999-07-01 355
1999-10-01 -621
2000-01-01 3251
2000-04-01 3058
2000-07-01 2042
2000-10-01 -231
2001-01-01 1396
2001-04-01 1199
2001-07-01 -752
2001-10-01 533
2002-01-01 1958
2002-04-01 1928
2002-07-01 -946
2002-10-01 1793
2003-01-01 2339
2003-04-01 2517
2003-07-01 1985
2003-10-01 2840
2004-01-01 1294
2004-04-01 2589
2004-07-01 803
2004-10-01 5677
2005-01-01 1974
2005-04-01 2351
2005-07-01 371
2005-10-01 4074
2006-01-01 3821
2006-04-01 9051
2006-07-01 6898
2006-10-01 7363
2007-01-01 7683
2007-04-01 1123
2007-07-01 6711
2007-10-01 9949
2008-01-01 13922
2008-04-01 13004
2008-07-01 1705
2008-10-01 1202
2009-01-01 4351
2009-04-01 2322
2009-07-01 1855
2009-10-01 187
2010-01-01 11919
2010-04-01 3076
2010-07-01 6026
2010-10-01 -2594
2011-01-01 19448
2011-04-01 1980
2011-07-01 1853
2011-10-01 13674
2012-01-01 18217
2012-04-01 10709
2012-07-01 4194
2012-10-01 -1168
2013-01-01 -235
2013-04-01 8359
2013-07-01 2935
2013-10-01 10176
2014-01-01 895
2014-04-01 -6283
2014-07-01 -2009
2014-10-01 2364
2015-01-01 4664
2015-04-01 -8325
2015-07-01 840
2015-10-01 -6345
2016-01-01 -2872
2016-04-01 900
2016-07-01 3519
2016-10-01 -9926
2017-01-01 9133
2017-04-01 -8700
2017-07-01 -2872
2017-10-01 949
2018-01-01 354
2018-04-01 -915