Quarter	US dollars
1986-09-30	518
1986-12-31	494
1987-03-31	544
1987-06-30	415
1987-09-30	446
1987-12-31	378
1988-03-31	255
1988-06-30	457
1988-09-30	351
1988-12-31	330
1989-03-31	380
1989-06-30	319
1989-09-30	404
1989-12-31	430
1990-03-31	389
1990-06-30	351
1990-09-30	470
1990-12-31	492
1991-03-31	460
1991-06-30	349
1991-09-30	434
1991-12-31	634
1992-03-31	495
1992-06-30	579
1992-09-30	511
1992-12-31	489
1993-03-31	345
1993-06-30	283
1993-09-30	341
1993-12-31	384
1994-03-31	347
1994-06-30	449
1994-09-30	449
1994-12-31	556
1995-03-31	407
1995-06-30	443
1995-09-30	367
1995-12-31	370
1996-03-31	564
1996-06-30	392
1996-09-30	343
1996-12-31	370
1997-03-31	358
1997-06-30	346
1997-09-30	366
1997-12-31	447
1998-03-31	552
1998-06-30	495
1998-09-30	606
1998-12-31	390
1999-03-31	396
1999-06-30	285
1999-09-30	336
1999-12-31	512
2000-03-31	605
2000-06-30	681
2000-09-30	431
2000-12-31	661
2001-03-31	816
2001-06-30	843
2001-09-30	990
2001-12-31	1212
2002-03-31	1262
2002-06-30	1242
2002-09-30	1444
2002-12-31	1359
2003-03-31	1257
2003-06-30	1123
2003-09-30	1547
2003-12-31	1615
2004-03-31	1573
2004-06-30	1506
2004-09-30	1583
2004-12-31	1743
2005-03-31	1559
2005-06-30	1547
2005-09-30	1521
2005-12-31	1813
2006-03-31	2132
2006-06-30	2736
2006-09-30	3590
2006-12-31	3364
2007-03-31	3559
2007-06-30	3404
2007-09-30	4023
2007-12-31	4382
2008-03-31	3839
2008-06-30	3771
2008-09-30	4382
2008-12-31	1969
2009-03-31	499
2009-06-30	505
2009-09-30	1180
2009-12-31	1790
2010-03-31	1633
2010-06-30	1822
2010-09-30	2111
2010-12-31	2120
2011-03-31	2893
2011-06-30	3328
2011-09-30	1596
2011-12-31	1396
2012-03-31	1592
2012-06-30	1289
2012-09-30	449
2012-12-31	273
2013-03-31	366
2013-06-30	252
2013-09-30	289
2013-12-31	395
2014-03-31	370
2014-06-30	326
2014-09-30	446
2014-12-31	358
2015-03-31	371
2015-06-30	461
2015-09-30	268
2015-12-31	274
2016-03-31	320
2016-06-30	208
2016-09-30	272
2016-12-31	302
2017-03-31	293
2017-06-30	253
2017-09-30	165
2017-12-31	109
2018-03-31	297
2018-06-30	1758
2018-09-30	1690
2018-12-31	1625
2019-03-31	225
2019-06-30	74
2019-09-30	371
2019-12-31	359
2020-03-31	196
2020-06-30	261
2020-09-30	427
2020-12-31	454
2021-03-31	141
2021-06-30	176
2021-09-30	36
2021-12-31	49
2022-03-31	84
2022-06-30	49
2022-09-30	105
2022-12-31	36
2023-03-31	51
2023-06-30	41
2023-09-30	36