Quarter	US dollars
1986-09-30	621
1986-12-31	630
1987-03-31	631
1987-06-30	643
1987-09-30	640
1987-12-31	631
1988-03-31	627
1988-06-30	604
1988-09-30	519
1988-12-31	548
1989-03-31	544
1989-06-30	542
1989-09-30	499
1989-12-31	466
1990-03-31	463
1990-06-30	440
1990-09-30	322
1990-12-31	323
1991-03-31	304
1991-06-30	291
1991-09-30	283
1991-12-31	282
1992-03-31	262
1992-06-30	251
1992-09-30	249
1992-12-31	179
1993-03-31	181
1993-06-30	189
1993-09-30	190
1993-12-31	253
1994-03-31	319
1994-06-30	190
1994-09-30	183
1994-12-31	176
1995-03-31	167
1995-06-30	199
1995-09-30	183
1995-12-31	284
1996-03-31	334
1996-06-30	323
1996-09-30	270
1996-12-31	448
1997-03-31	518
1997-06-30	326
1997-09-30	335
1997-12-31	312
1998-03-31	370
1998-06-30	472
1998-09-30	401
1998-12-31	375
1999-03-31	344
1999-06-30	426
1999-09-30	360
1999-12-31	345
2000-03-31	292
2000-06-30	337
2000-09-30	319
2000-12-31	229
2001-03-31	205
2001-06-30	167
2001-09-30	184
2001-12-31	176
2002-03-31	277
2002-06-30	271
2002-09-30	319
2002-12-31	346
2003-03-31	341
2003-06-30	302
2003-09-30	292
2003-12-31	340
2004-03-31	217
2004-06-30	210
2004-09-30	161
2004-12-31	241
2005-03-31	199
2005-06-30	287
2005-09-30	393
2005-12-31	389
2006-03-31	467
2006-06-30	411
2006-09-30	508
2006-12-31	778
2007-03-31	1104
2007-06-30	1009
2007-09-30	874
2007-12-31	753
2008-03-31	1394
2008-06-30	1567
2008-09-30	1295
2008-12-31	586
2009-03-31	616
2009-06-30	723
2009-09-30	767
2009-12-31	800
2010-03-31	746
2010-06-30	712
2010-09-30	490
2010-12-31	453
2011-03-31	638
2011-06-30	630
2011-09-30	763
2011-12-31	1084
2012-03-31	1128
2012-06-30	1055
2012-09-30	1230
2012-12-31	1411
2013-03-31	1250
2013-06-30	952
2013-09-30	752
2013-12-31	844
2014-03-31	539
2014-06-30	596
2014-09-30	569
2014-12-31	741
2015-03-31	1178
2015-06-30	612
2015-09-30	512
2015-12-31	701
2016-03-31	698
2016-06-30	743
2016-09-30	669
2016-12-31	823
2017-03-31	679
2017-06-30	486
2017-09-30	728
2017-12-31	492
2018-03-31	356
2018-06-30	398
2018-09-30	425
2018-12-31	614
2019-03-31	666
2019-06-30	957
2019-09-30	793
2019-12-31	614
2020-03-31	622
2020-06-30	666
2020-09-30	700
2020-12-31	541
2021-03-31	449
2021-06-30	395
2021-09-30	456
2021-12-31	540
2022-03-31	602
2022-06-30	1830
2022-09-30	781
2022-12-31	1003
2023-03-31	1197
2023-06-30	1310
2023-09-30	862