Quarter	US dollars
1986-09-30	7608
1986-12-31	7398
1987-03-31	7347
1987-06-30	7254
1987-09-30	7079
1987-12-31	7641
1988-03-31	5486
1988-06-30	5567
1988-09-30	5298
1988-12-31	6075
1989-03-31	5586
1989-06-30	5447
1989-09-30	5461
1989-12-31	5540
1990-03-31	5732
1990-06-30	5578
1990-09-30	5961
1990-12-31	6098
1991-03-31	5256
1991-06-30	5346
1991-09-30	4879
1991-12-31	4679
1992-03-31	4504
1992-06-30	4608
1992-09-30	4430
1992-12-31	4078
1993-03-31	4134
1993-06-30	4270
1993-09-30	3705
1993-12-31	3705
1994-03-31	3604
1994-06-30	3202
1994-09-30	3484
1994-12-31	3334
1995-03-31	3040
1995-06-30	2759
1995-09-30	2935
1995-12-31	2877
1996-03-31	2793
1996-06-30	2793
1996-09-30	2973
1996-12-31	3119
1997-03-31	3281
1997-06-30	2567
1997-09-30	2475
1997-12-31	2570
1998-03-31	2503
1998-06-30	2787
1998-09-30	2668
1998-12-31	2432
1999-03-31	2537
1999-06-30	2554
1999-09-30	2856
1999-12-31	3464
2000-03-31	4576
2000-06-30	4155
2000-09-30	4198
2000-12-31	3855
2001-03-31	3999
2001-06-30	4257
2001-09-30	3835
2001-12-31	3823
2002-03-31	3484
2002-06-30	3360
2002-09-30	3308
2002-12-31	3391
2003-03-31	3515
2003-06-30	3552
2003-09-30	3669
2003-12-31	3557
2004-03-31	3588
2004-06-30	3477
2004-09-30	3551
2004-12-31	3974
2005-03-31	3804
2005-06-30	3593
2005-09-30	3777
2005-12-31	3609
2006-03-31	3725
2006-06-30	4071
2006-09-30	3995
2006-12-31	3841
2007-03-31	3983
2007-06-30	4310
2007-09-30	4057
2007-12-31	4254
2008-03-31	4325
2008-06-30	4051
2008-09-30	3887
2008-12-31	3735
2009-03-31	3549
2009-06-30	3747
2009-09-30	2978
2009-12-31	2972
2010-03-31	3472
2010-06-30	3162
2010-09-30	3048
2010-12-31	3581
2011-03-31	3161
2011-06-30	2965
2011-09-30	2518
2011-12-31	2372
2012-03-31	2272
2012-06-30	2003
2012-09-30	2080
2012-12-31	2262
2013-03-31	2563
2013-06-30	1981
2013-09-30	2001
2013-12-31	1916
2014-03-31	2029
2014-06-30	1882
2014-09-30	2070
2014-12-31	1849
2015-03-31	1931
2015-06-30	1934
2015-09-30	2120
2015-12-31	2028
2016-03-31	2154
2016-06-30	1977
2016-09-30	2169
2016-12-31	1984
2017-03-31	1819
2017-06-30	1877
2017-09-30	1884
2017-12-31	1767
2018-03-31	1854
2018-06-30	1651
2018-09-30	1541
2018-12-31	1491
2019-03-31	1761
2019-06-30	1600
2019-09-30	1575
2019-12-31	1989
2020-03-31	1867
2020-06-30	1432
2020-09-30	1671
2020-12-31	1797
2021-03-31	1548
2021-06-30	1644
2021-09-30	1737
2021-12-31	2000
2022-03-31	1233
2022-06-30	1359
2022-09-30	1426
2022-12-31	854
2023-03-31	1403
2023-06-30	1454
2023-09-30	1362