Quarter	US dollars
1986-09-30	898
1986-12-31	1033
1987-03-31	1146
1987-06-30	1177
1987-09-30	1220
1987-12-31	1017
1988-03-31	843
1988-06-30	945
1988-09-30	921
1988-12-31	729
1989-03-31	697
1989-06-30	616
1989-09-30	496
1989-12-31	484
1990-03-31	566
1990-06-30	622
1990-09-30	774
1990-12-31	1102
1991-03-31	1508
1991-06-30	920
1991-09-30	761
1991-12-31	351
1992-03-31	317
1992-06-30	443
1992-09-30	761
1992-12-31	657
1993-03-31	825
1993-06-30	577
1993-09-30	231
1993-12-31	223
1994-03-31	355
1994-06-30	534
1994-09-30	447
1994-12-31	566
1995-03-31	479
1995-06-30	691
1995-09-30	733
1995-12-31	931
1996-03-31	865
1996-06-30	1237
1996-09-30	1508
1996-12-31	1492
1997-03-31	1540
1997-06-30	1384
1997-09-30	1625
1997-12-31	1599
1998-03-31	1782
1998-06-30	1666
1998-09-30	1476
1998-12-31	1418
1999-03-31	1770
1999-06-30	1698
1999-09-30	1789
1999-12-31	1759
2000-03-31	2005
2000-06-30	2324
2000-09-30	2557
2000-12-31	2879
2001-03-31	3095
2001-06-30	3229
2001-09-30	3807
2001-12-31	3260
2002-03-31	2845
2002-06-30	3267
2002-09-30	3532
2002-12-31	3090
2003-03-31	3344
2003-06-30	3046
2003-09-30	3585
2003-12-31	4208
2004-03-31	4363
2004-06-30	4545
2004-09-30	5164
2004-12-31	5910
2005-03-31	6644
2005-06-30	8915
2005-09-30	11170
2005-12-31	12407
2006-03-31	14503
2006-06-30	17119
2006-09-30	18717
2006-12-31	19861
2007-03-31	21291
2007-06-30	22576
2007-09-30	21340
2007-12-31	22127
2008-03-31	24037
2008-06-30	24460
2008-09-30	26641
2008-12-31	17850
2009-03-31	16503
2009-06-30	17165
2009-09-30	17416
2009-12-31	17323
2010-03-31	16382
2010-06-30	20427
2010-09-30	16441
2010-12-31	13587
2011-03-31	17356
2011-06-30	13600
2011-09-30	13088
2011-12-31	13812
2012-03-31	16580
2012-06-30	15470
2012-09-30	15493
2012-12-31	12560
2013-03-31	14605
2013-06-30	12933
2013-09-30	12777
2013-12-31	12404
2014-03-31	13757
2014-06-30	12707
2014-09-30	13625
2014-12-31	13141
2015-03-31	12825
2015-06-30	13177
2015-09-30	13278
2015-12-31	13356
2016-03-31	13437
2016-06-30	15062
2016-09-30	15156
2016-12-31	13824
2017-03-31	13124
2017-06-30	12972
2017-09-30	12342
2017-12-31	12158
2018-03-31	11699
2018-06-30	11651
2018-09-30	11630
2018-12-31	12673
2019-03-31	11874
2019-06-30	11224
2019-09-30	11569
2019-12-31	11564
2020-03-31	11336
2020-06-30	11552
2020-09-30	11055
2020-12-31	10766
2021-03-31	10237
2021-06-30	9371
2021-09-30	10033
2021-12-31	10258
2022-03-31	9838
2022-06-30	9754
2022-09-30	10377
2022-12-31	10604
2023-03-31	9879
2023-06-30	9384
2023-09-30	9203