Quarter	US dollars
1986-12-31	3366
1987-03-31	4029
1987-06-30	4615
1987-09-30	10200
1987-12-31	1277
1988-03-31	2458
1988-06-30	2893
1988-09-30	14728
1988-12-31	-11678
1989-03-31	6823
1989-06-30	889
1989-09-30	6229
1989-12-31	3804
1990-03-31	6587
1990-06-30	-3727
1990-09-30	6669
1990-12-31	-1948
1991-03-31	-12094
1991-06-30	-6092
1991-09-30	-562
1991-12-31	-11682
1992-03-31	-3483
1992-06-30	-11612
1992-09-30	-3856
1992-12-31	-12423
1993-03-31	-3051
1993-06-30	-9637
1993-09-30	2769
1993-12-31	-1624
1994-03-31	3609
1994-06-30	-4204
1994-09-30	9280
1994-12-31	-420
1995-03-31	10947
1995-06-30	-9629
1995-09-30	19866
1995-12-31	8837
1996-03-31	-7436
1996-06-30	7847
1996-09-30	8649
1996-12-31	14847
1997-03-31	11155
1997-06-30	13092
1997-09-30	-9074
1997-12-31	49015
1998-03-31	-22938
1998-06-30	12414
1998-09-30	18798
1998-12-31	17330
1999-03-31	-43220
1999-06-30	-18123
1999-09-30	10957
1999-12-31	6666
2000-03-31	-2062
2000-06-30	16005
2000-09-30	4971
2000-12-31	8928
2001-03-31	-31391
2001-06-30	3334
2001-09-30	-3509
2001-12-31	652
2002-03-31	-6005
2002-06-30	10744
2002-09-30	4319
2002-12-31	5044
2003-03-31	-5971
2003-06-30	7455
2003-09-30	-5743
2003-12-31	8023
2004-03-31	-838
2004-06-30	16716
2004-09-30	4771
2004-12-31	14261
2005-03-31	-28759
2005-06-30	14652
2005-09-30	-25418
2005-12-31	-4948
2006-03-31	-11307
2006-06-30	-11741
2006-09-30	2128
2006-12-31	8994
2007-03-31	11885
2007-06-30	-3346
2007-09-30	30440
2007-12-31	27710
2008-03-31	63633
2008-06-30	-74774
2008-09-30	26157
2008-12-31	-90148
2009-03-31	-33814
2009-06-30	21013
2009-09-30	5283
2009-12-31	-41607
2010-03-31	7129
2010-06-30	-1581
2010-09-30	17729
2010-12-31	9673
2011-03-31	-24121
2011-06-30	-7942
2011-09-30	45229
2011-12-31	12219
2012-03-31	809
2012-06-30	-3276
2012-09-30	-23878
2012-12-31	-9240
2013-03-31	23805
2013-06-30	1462
2013-09-30	13151
2013-12-31	-5490
2014-03-31	-6458
2014-06-30	17297
2014-09-30	-2511
2014-12-31	18730
2015-03-31	-32553
2015-06-30	1801
2015-09-30	-5088
2015-12-31	7603
2016-03-31	14281
2016-06-30	-3460
2016-09-30	-5515
2016-12-31	23255
2017-03-31	-32598
2017-06-30	2843
2017-09-30	44537
2017-12-31	-28192
2018-03-31	32428
2018-06-30	739
2018-09-30	21688
2018-12-31	-3754
2019-03-31	-4277
2019-06-30	19555
2019-09-30	-12118
2019-12-31	-19798
2020-03-31	67471
2020-06-30	-14973
2020-09-30	-6181
2020-12-31	-31165
2021-03-31	25322
2021-06-30	-1395
2021-09-30	-11193
2021-12-31	-47411
2022-03-31	84496
2022-06-30	48508
2022-09-30	11621
2022-12-31	-9228
2023-03-31	55995
2023-06-30	-6728
2023-09-30	41821