Quarter	US dollars
1986-09-30	634
1986-12-31	496
1987-03-31	776
1987-06-30	942
1987-09-30	725
1987-12-31	970
1988-03-31	1114
1988-06-30	896
1988-09-30	727
1988-12-31	679
1989-03-31	622
1989-06-30	587
1989-09-30	633
1989-12-31	547
1990-03-31	570
1990-06-30	615
1990-09-30	674
1990-12-31	1221
1991-03-31	1153
1991-06-30	891
1991-09-30	751
1991-12-31	662
1992-03-31	657
1992-06-30	904
1992-09-30	798
1992-12-31	842
1993-03-31	527
1993-06-30	627
1993-09-30	546
1993-12-31	545
1994-03-31	481
1994-06-30	514
1994-09-30	470
1994-12-31	487
1995-03-31	436
1995-06-30	443
1995-09-30	620
1995-12-31	459
1996-03-31	540
1996-06-30	1062
1996-09-30	1655
1996-12-31	2064
1997-03-31	1630
1997-06-30	1106
1997-09-30	907
1997-12-31	666
1998-03-31	683
1998-06-30	1391
1998-09-30	1087
1998-12-31	909
1999-03-31	1019
1999-06-30	1280
1999-09-30	874
1999-12-31	1136
2000-03-31	1442
2000-06-30	1047
2000-09-30	1151
2000-12-31	1102
2001-03-31	2032
2001-06-30	1333
2001-09-30	1303
2001-12-31	993
2002-03-31	1222
2002-06-30	1752
2002-09-30	1544
2002-12-31	1256
2003-03-31	1178
2003-06-30	1874
2003-09-30	1380
2003-12-31	1399
2004-03-31	1770
2004-06-30	1499
2004-09-30	1340
2004-12-31	1665
2005-03-31	1620
2005-06-30	1971
2005-09-30	1773
2005-12-31	2648
2006-03-31	3576
2006-06-30	2807
2006-09-30	2999
2006-12-31	3625
2007-03-31	2865
2007-06-30	2320
2007-09-30	1981
2007-12-31	2178
2008-03-31	9711
2008-06-30	1780
2008-09-30	2071
2008-12-31	1964
2009-03-31	2668
2009-06-30	2398
2009-09-30	3248
2009-12-31	2290
2010-03-31	2374
2010-06-30	3367
2010-09-30	4021
2010-12-31	2510
2011-03-31	3750
2011-06-30	4362
2011-09-30	3886
2011-12-31	2945
2012-03-31	3065
2012-06-30	5490
2012-09-30	3287
2012-12-31	4059
2013-03-31	4025
2013-06-30	3037
2013-09-30	2424
2013-12-31	3701
2014-03-31	3942
2014-06-30	4720
2014-09-30	3175
2014-12-31	4541
2015-03-31	5590
2015-06-30	5583
2015-09-30	3089
2015-12-31	5084
2016-03-31	5282
2016-06-30	5252
2016-09-30	5719
2016-12-31	4404
2017-03-31	3241
2017-06-30	3816
2017-09-30	3064
2017-12-31	2820
2018-03-31	3344
2018-06-30	3673
2018-09-30	3602
2018-12-31	3553
2019-03-31	3964
2019-06-30	3234
2019-09-30	3552
2019-12-31	3876
2020-03-31	5642
2020-06-30	3170
2020-09-30	3248
2020-12-31	3551
2021-03-31	2776
2021-06-30	2844
2021-09-30	2646
2021-12-31	3102
2022-03-31	3391
2022-06-30	3457
2022-09-30	3502
2022-12-31	2979
2023-03-31	3101
2023-06-30	2963
2023-09-30	3649