Quarter	US dollars
1986-09-30	146
1986-12-31	151
1987-03-31	120
1987-06-30	104
1987-09-30	92
1987-12-31	91
1988-03-31	106
1988-06-30	80
1988-09-30	62
1988-12-31	61
1989-03-31	60
1989-06-30	216
1989-09-30	171
1989-12-31	205
1990-03-31	188
1990-06-30	235
1990-09-30	192
1990-12-31	173
1991-03-31	155
1991-06-30	169
1991-09-30	128
1991-12-31	76
1992-03-31	65
1992-06-30	151
1992-09-30	195
1992-12-31	227
1993-03-31	209
1993-06-30	166
1993-09-30	194
1993-12-31	172
1994-03-31	168
1994-06-30	85
1994-09-30	86
1994-12-31	69
1995-03-31	45
1995-06-30	59
1995-09-30	60
1995-12-31	118
1996-03-31	284
1996-06-30	282
1996-09-30	321
1996-12-31	292
1997-03-31	284
1997-06-30	258
1997-09-30	48
1997-12-31	437
1998-03-31	528
1998-06-30	400
1998-09-30	478
1998-12-31	614
1999-03-31	632
1999-06-30	588
1999-09-30	648
1999-12-31	591
2000-03-31	512
2000-06-30	446
2000-09-30	475
2000-12-31	449
2001-03-31	517
2001-06-30	440
2001-09-30	559
2001-12-31	552
2002-03-31	496
2002-06-30	558
2002-09-30	394
2002-12-31	346
2003-03-31	284
2003-06-30	327
2003-09-30	362
2003-12-31	597
2004-03-31	453
2004-06-30	414
2004-09-30	566
2004-12-31	700
2005-03-31	643
2005-06-30	610
2005-09-30	568
2005-12-31	1636
2006-03-31	1696
2006-06-30	1275
2006-09-30	1432
2006-12-31	1307
2007-03-31	1743
2007-06-30	1437
2007-09-30	1664
2007-12-31	1269
2008-03-31	1204
2008-06-30	1392
2008-09-30	3330
2008-12-31	3270
2009-03-31	3249
2009-06-30	3210
2009-09-30	3310
2009-12-31	3530
2010-03-31	3652
2010-06-30	2304
2010-09-30	2003
2010-12-31	1837
2011-03-31	1613
2011-06-30	2308
2011-09-30	1824
2011-12-31	1672
2012-03-31	2204
2012-06-30	3047
2012-09-30	2184
2012-12-31	1463
2013-03-31	1324
2013-06-30	2226
2013-09-30	2914
2013-12-31	1328
2014-03-31	1742
2014-06-30	2618
2014-09-30	1632
2014-12-31	1963
2015-03-31	1983
2015-06-30	2224
2015-09-30	2412
2015-12-31	2183
2016-03-31	1517
2016-06-30	1471
2016-09-30	1588
2016-12-31	3465
2017-03-31	3000
2017-06-30	2829
2017-09-30	2797
2017-12-31	2623
2018-03-31	2776
2018-06-30	2717
2018-09-30	2502
2018-12-31	2540
2019-03-31	2656
2019-06-30	2810
2019-09-30	2808
2019-12-31	2907
2020-03-31	2873
2020-06-30	2763
2020-09-30	2738
2020-12-31	2651
2021-03-31	3040
2021-06-30	3183
2021-09-30	2657
2021-12-31	654
2022-03-31	528
2022-06-30	579
2022-09-30	765
2022-12-31	859
2023-03-31	980
2023-06-30	801
2023-09-30	854