Quarter	US dollars
1986-09-30	2106
1986-12-31	2345
1987-03-31	2226
1987-06-30	2116
1987-09-30	2029
1987-12-31	1913
1988-03-31	1756
1988-06-30	1594
1988-09-30	1414
1988-12-31	1522
1989-03-31	1373
1989-06-30	1204
1989-09-30	1416
1989-12-31	1179
1990-03-31	1094
1990-06-30	1057
1990-09-30	1321
1990-12-31	1309
1991-03-31	1241
1991-06-30	1239
1991-09-30	1364
1991-12-31	1369
1992-03-31	1358
1992-06-30	1569
1992-09-30	1855
1992-12-31	1490
1993-03-31	1702
1993-06-30	1831
1993-09-30	1844
1993-12-31	2293
1994-03-31	2659
1994-06-30	2743
1994-09-30	1450
1994-12-31	1360
1995-03-31	888
1995-06-30	1113
1995-09-30	942
1995-12-31	956
1996-03-31	1039
1996-06-30	1532
1996-09-30	2340
1996-12-31	1556
1997-03-31	1948
1997-06-30	2632
1997-09-30	2422
1997-12-31	2800
1998-03-31	2223
1998-06-30	2432
1998-09-30	1976
1998-12-31	1702
1999-03-31	1572
1999-06-30	1692
1999-09-30	1722
1999-12-31	1495
2000-03-31	1684
2000-06-30	1757
2000-09-30	1747
2000-12-31	2391
2001-03-31	2580
2001-06-30	2759
2001-09-30	1687
2001-12-31	1742
2002-03-31	2342
2002-06-30	2815
2002-09-30	3248
2002-12-31	2923
2003-03-31	3300
2003-06-30	3809
2003-09-30	4131
2003-12-31	3771
2004-03-31	4875
2004-06-30	4469
2004-09-30	5596
2004-12-31	5188
2005-03-31	5879
2005-06-30	5420
2005-09-30	5411
2005-12-31	3856
2006-03-31	5487
2006-06-30	6162
2006-09-30	6095
2006-12-31	5866
2007-03-31	6507
2007-06-30	6393
2007-09-30	5442
2007-12-31	5156
2008-03-31	6009
2008-06-30	6830
2008-09-30	4245
2008-12-31	3403
2009-03-31	3114
2009-06-30	2924
2009-09-30	2641
2009-12-31	2995
2010-03-31	2700
2010-06-30	2581
2010-09-30	2868
2010-12-31	2957
2011-03-31	3717
2011-06-30	4470
2011-09-30	3830
2011-12-31	4370
2012-03-31	2559
2012-06-30	3248
2012-09-30	2979
2012-12-31	3163
2013-03-31	3648
2013-06-30	3927
2013-09-30	4073
2013-12-31	5083
2014-03-31	6869
2014-06-30	7520
2014-09-30	7925
2014-12-31	6201
2015-03-31	6088
2015-06-30	5641
2015-09-30	5334
2015-12-31	4772
2016-03-31	5136
2016-06-30	4677
2016-09-30	2971
2016-12-31	3671
2017-03-31	3862
2017-06-30	4233
2017-09-30	3518
2017-12-31	3607
2018-03-31	4146
2018-06-30	4381
2018-09-30	4184
2018-12-31	3220
2019-03-31	3847
2019-06-30	3303
2019-09-30	3886
2019-12-31	4240
2020-03-31	4571
2020-06-30	4255
2020-09-30	4548
2020-12-31	5499
2021-03-31	4795
2021-06-30	3674
2021-09-30	3871
2021-12-31	4149
2022-03-31	4441
2022-06-30	5116
2022-09-30	4010
2022-12-31	3751
2023-03-31	4002
2023-06-30	4741
2023-09-30	5075