Quarterly Millions of US Dollars
1978-01-01 15
1981-04-01 45
1990-01-01 -15
1990-10-01 21
1991-04-01 15
1991-10-01 150
1992-01-01 145
1992-04-01 130
1992-07-01 325
1992-10-01 9
1993-01-01 74
1993-04-01 99
1993-07-01 469
1993-10-01 1655
1994-01-01 696
1994-04-01 129
1994-07-01 84
1994-10-01 731
1995-01-01 -174
1995-04-01 -47
1995-07-01 98
1995-10-01 583
1996-01-01 -28
1996-04-01 601
1996-07-01 314
1996-10-01 -168
1997-01-01 1428
1997-04-01 808
1997-07-01 1708
1997-10-01 -270
1998-01-01 724
1998-04-01 2244
1998-07-01 -43
1998-10-01 -42
1999-01-01 25
1999-04-01 747
1999-07-01 323
1999-10-01 -566
2000-01-01 117
2000-04-01 482
2000-07-01 392
2000-10-01 -1240
2001-01-01 -1
2001-04-01 -277
2001-07-01 -166
2001-10-01 -558
2002-01-01 -208
2002-04-01 -294
2002-07-01 -933
2002-10-01 -244
2003-01-01 -734
2003-04-01 -959
2003-07-01 -851
2003-10-01 100
2004-01-01 -1005
2004-04-01 -265
2004-07-01 -641
2004-10-01 -30
2005-01-01 60
2005-04-01 -512
2005-07-01 -35
2005-10-01 330
2006-01-01 67
2006-04-01 -200
2006-07-01 326
2006-10-01 220
2007-01-01 -507
2007-04-01 925
2007-07-01 -300
2007-10-01 695
2008-01-01 -309
2008-04-01 -1276
2008-07-01 -335
2009-01-01 -445
2009-04-01 -448
2009-07-01 -200
2009-10-01 -78
2010-04-01 476
2010-07-01 275
2010-10-01 413
2011-01-01 382
2011-04-01 139
2011-07-01 84
2011-10-01 -48
2012-01-01 -410
2012-04-01 13
2012-07-01 -175
2012-10-01 -12
2013-01-01 -100
2013-04-01 -7
2013-10-01 450
2014-01-01 -98
2014-04-01 1000
2014-07-01 -247
2014-10-01 -276
2015-01-01 500
2015-04-01 1500
2015-07-01 58
2015-10-01 100
2016-01-01 1360
2016-04-01 618
2016-07-01 2255
2016-10-01 161
2017-01-01 1750
2017-04-01 161
2017-07-01 800
2017-10-01 2082
2018-01-01 1233
2018-04-01 350