Quarterly Millions of US Dollars
1987-04-01 46
1987-07-01 20
1987-10-01 98
1988-01-01 46
1988-04-01 71
1988-07-01 100
1988-10-01 50
1989-01-01 70
1989-04-01 100
1989-07-01 105
1989-10-01 102
1990-01-01 152
1990-04-01 109
1990-07-01 162
1990-10-01 20
1991-01-01 123
1991-04-01 146
1991-07-01 230
1991-10-01 24
1992-01-01 297
1992-04-01 74
1992-07-01 230
1992-10-01 -74
1993-01-01 242
1993-04-01 77
1993-07-01 240
1993-10-01 16
1994-01-01 119
1994-04-01 83
1994-07-01 198
1994-10-01 15
1995-01-01 140
1995-04-01 103
1995-07-01 262
1995-10-01 -25
1996-01-01 311
1996-04-01 130
1996-07-01 129
1996-10-01 75
1997-01-01 202
1997-04-01 230
1997-07-01 224
1997-10-01 -59
1998-01-01 268
1998-04-01 138
1998-07-01 289
1998-10-01 10
1999-01-01 142
1999-04-01 157
1999-07-01 216
1999-10-01 91
2000-01-01 -17
2000-04-01 113
2000-07-01 60
2000-10-01 149
2001-01-01 -171
2001-04-01 261
2001-07-01 218
2001-10-01 288
2002-01-01 339
2002-04-01 239
2002-07-01 215
2002-10-01 163
2003-01-01 526
2003-04-01 174
2003-07-01 630
2003-10-01 412
2004-01-01 288
2004-04-01 499
2004-07-01 315
2004-10-01 850
2005-01-01 186
2005-04-01 839
2005-07-01 931
2005-10-01 807
2006-01-01 302
2006-04-01 1292
2006-07-01 451
2006-10-01 1596
2007-01-01 -176
2007-04-01 1667
2007-07-01 1256
2007-10-01 1779
2008-01-01 -1233
2008-04-01 3196
2008-07-01 732
2008-10-01 -2560
2009-01-01 96
2009-04-01 -367
2009-07-01 224
2009-10-01 295
2010-01-01 -534
2010-04-01 2079
2010-07-01 550
2010-10-01 49
2011-01-01 486
2011-04-01 194
2011-07-01 -127
2011-10-01 1536
2012-01-01 179
2012-04-01 182
2012-07-01 -155
2012-10-01 131
2013-01-01 518
2013-04-01 -154
2013-07-01 21
2013-10-01 137
2014-01-01 -235
2014-04-01 -75
2014-07-01 265
2014-10-01 474
2015-01-01 85
2015-04-01 62
2015-07-01 563
2015-10-01 23
2016-01-01 375
2016-04-01 -117
2016-07-01 421
2016-10-01 -146
2017-01-01 -35
2017-04-01 441
2017-07-01 -123
2017-10-01 -298
2018-01-01 278