Quarter	US dollars
1986-09-30	615
1986-12-31	509
1987-03-31	523
1987-06-30	600
1987-09-30	640
1987-12-31	726
1988-03-31	875
1988-06-30	807
1988-09-30	553
1988-12-31	655
1989-03-31	661
1989-06-30	905
1989-09-30	1232
1989-12-31	1436
1990-03-31	1820
1990-06-30	1845
1990-09-30	1641
1990-12-31	1539
1991-03-31	1699
1991-06-30	1516
1991-09-30	1895
1991-12-31	1867
1992-03-31	1601
1992-06-30	2135
1992-09-30	2306
1992-12-31	1295
1993-03-31	1119
1993-06-30	1120
1993-09-30	897
1993-12-31	650
1994-03-31	1059
1994-06-30	1281
1994-09-30	1510
1994-12-31	1112
1995-03-31	1801
1995-06-30	2423
1995-09-30	3188
1995-12-31	2900
1996-03-31	2777
1996-06-30	3178
1996-09-30	2349
1996-12-31	1625
1997-03-31	1652
1997-06-30	1695
1997-09-30	1062
1997-12-31	1978
1998-03-31	1820
1998-06-30	2365
1998-09-30	1970
1998-12-31	2326
1999-03-31	3020
1999-06-30	2005
1999-09-30	1926
1999-12-31	2624
2000-03-31	2993
2000-06-30	3740
2000-09-30	3945
2000-12-31	3680
2001-03-31	4445
2001-06-30	4489
2001-09-30	4236
2001-12-31	4553
2002-03-31	3613
2002-06-30	3562
2002-09-30	2498
2002-12-31	1610
2003-03-31	3731
2003-06-30	2994
2003-09-30	3558
2003-12-31	4894
2004-03-31	4485
2004-06-30	4534
2004-09-30	5016
2004-12-31	4505
2005-03-31	5709
2005-06-30	4410
2005-09-30	4769
2005-12-31	6000
2006-03-31	6811
2006-06-30	6582
2006-09-30	6358
2006-12-31	7468
2007-03-31	6383
2007-06-30	7816
2007-09-30	7850
2007-12-31	9451
2008-03-31	6914
2008-06-30	6211
2008-09-30	5926
2008-12-31	5589
2009-03-31	4582
2009-06-30	5894
2009-09-30	4569
2009-12-31	3252
2010-03-31	2773
2010-06-30	3185
2010-09-30	2961
2010-12-31	2734
2011-03-31	2766
2011-06-30	3086
2011-09-30	3583
2011-12-31	2099
2012-03-31	1515
2012-06-30	1247
2012-09-30	1963
2012-12-31	1835
2013-03-31	1564
2013-06-30	1740
2013-09-30	2013
2013-12-31	2254
2014-03-31	2199
2014-06-30	2390
2014-09-30	2268
2014-12-31	2486
2015-03-31	2226
2015-06-30	2503
2015-09-30	2720
2015-12-31	2969
2016-03-31	3083
2016-06-30	2910
2016-09-30	3562
2016-12-31	1843
2017-03-31	1720
2017-06-30	2013
2017-09-30	2528
2017-12-31	2234
2018-03-31	2173
2018-06-30	3344
2018-09-30	3017
2018-12-31	3691
2019-03-31	2448
2019-06-30	2568
2019-09-30	3006
2019-12-31	2702
2020-03-31	3880
2020-06-30	3588
2020-09-30	2652
2020-12-31	4191
2021-03-31	3447
2021-06-30	3121
2021-09-30	3356
2021-12-31	2442
2022-03-31	3914
2022-06-30	3948
2022-09-30	3811
2022-12-31	4095
2023-03-31	3426
2023-06-30	4293
2023-09-30	3011