Quarterly US dollars
1986-09-30 190
1986-12-31 189
1987-03-31 220
1987-06-30 225
1987-09-30 169
1987-12-31 209
1988-03-31 190
1988-06-30 184
1988-09-30 179
1988-12-31 175
1989-03-31 160
1989-06-30 158
1989-09-30 163
1989-12-31 209
1990-03-31 176
1990-06-30 151
1990-09-30 152
1990-12-31 203
1991-03-31 181
1991-06-30 157
1991-09-30 126
1991-12-31 159
1992-03-31 170
1992-06-30 156
1992-09-30 172
1992-12-31 129
1993-03-31 139
1993-06-30 136
1993-09-30 179
1993-12-31 176
1994-03-31 185
1994-06-30 176
1994-09-30 186
1994-12-31 177
1995-03-31 234
1995-06-30 191
1995-09-30 228
1995-12-31 285
1996-03-31 242
1996-06-30 273
1996-09-30 411
1996-12-31 539
1997-03-31 620
1997-06-30 763
1997-09-30 739
1997-12-31 591
1998-03-31 671
1998-06-30 580
1998-09-30 494
1998-12-31 316
1999-03-31 309
1999-06-30 408
1999-09-30 353
1999-12-31 315
2000-03-31 321
2000-06-30 458
2000-09-30 427
2000-12-31 457
2001-03-31 630
2001-06-30 673
2001-09-30 517
2001-12-31 485
2002-03-31 436
2002-06-30 576
2002-09-30 556
2002-12-31 415
2003-03-31 481
2003-06-30 486
2003-09-30 666
2003-12-31 514
2004-03-31 584
2004-06-30 608
2004-09-30 665
2004-12-31 1014
2005-03-31 1037
2005-06-30 870
2005-09-30 797
2005-12-31 798
2006-03-31 787
2006-06-30 748
2006-09-30 664
2006-12-31 722
2007-03-31 691
2007-06-30 708
2007-09-30 712
2007-12-31 658
2008-03-31 761
2008-06-30 743
2008-09-30 601
2008-12-31 475
2009-03-31 507
2009-06-30 470
2009-09-30 791
2009-12-31 1228
2010-03-31 1145
2010-06-30 301
2010-09-30 356
2010-12-31 677
2011-03-31 422
2011-06-30 560
2011-09-30 1152
2011-12-31 1160
2012-03-31 870
2012-06-30 915
2012-09-30 709
2012-12-31 951
2013-03-31 606
2013-06-30 1131
2013-09-30 829
2013-12-31 1028
2014-03-31 1063
2014-06-30 1088
2014-09-30 2714
2014-12-31 1180
2015-03-31 797
2015-06-30 803
2015-09-30 723
2015-12-31 264
2016-03-31 276
2016-06-30 337
2016-09-30 370
2016-12-31 420
2017-03-31 510
2017-06-30 607
2017-09-30 845
2017-12-31 733
2018-03-31 641
2018-06-30 863
2018-09-30 1010
2018-12-31 1048
2019-03-31 1177
2019-06-30 1103
2019-09-30 1212
2019-12-31 1127
2020-03-31 690
2020-06-30 413
2020-09-30 357
2020-12-31 219
2021-03-31 225
2021-06-30 219
2021-09-30 221
2021-12-31 219
2022-03-31 161
2022-06-30 348
2022-09-30 317
2022-12-31 330
2023-03-31 431
2023-06-30 417
2023-09-30 386