Quarter	US dollars
1986-09-30	70
1986-12-31	78
1987-03-31	109
1987-06-30	137
1987-09-30	195
1987-12-31	187
1988-03-31	175
1988-06-30	217
1988-09-30	288
1988-12-31	284
1989-03-31	303
1989-06-30	280
1989-09-30	417
1989-12-31	405
1990-03-31	410
1990-06-30	453
1990-09-30	546
1990-12-31	504
1991-03-31	566
1991-06-30	470
1991-09-30	571
1991-12-31	566
1992-03-31	1427
1992-06-30	1562
1992-09-30	1472
1992-12-31	1270
1993-03-31	1241
1993-06-30	1202
1993-09-30	1229
1993-12-31	1491
1994-03-31	1498
1994-06-30	1550
1994-09-30	1538
1994-12-31	1560
1995-03-31	430
1995-06-30	385
1995-09-30	367
1995-12-31	248
1996-03-31	333
1996-06-30	580
1996-09-30	534
1996-12-31	471
1997-03-31	481
1997-06-30	592
1997-09-30	477
1997-12-31	534
1998-03-31	489
1998-06-30	402
1998-09-30	406
1998-12-31	368
1999-03-31	592
1999-06-30	589
1999-09-30	608
1999-12-31	639
2000-03-31	622
2000-06-30	1418
2000-09-30	1488
2000-12-31	1166
2001-03-31	1357
2001-06-30	1878
2001-09-30	1843
2001-12-31	1566
2002-03-31	2191
2002-06-30	1901
2002-09-30	1801
2002-12-31	1416
2003-03-31	1885
2003-06-30	1116
2003-09-30	2037
2003-12-31	1612
2004-03-31	2062
2004-06-30	2216
2004-09-30	2220
2004-12-31	2246
2005-03-31	2443
2005-06-30	2643
2005-09-30	2113
2005-12-31	2676
2006-03-31	3260
2006-06-30	3169
2006-09-30	3075
2006-12-31	2992
2007-03-31	3142
2007-06-30	3057
2007-09-30	3741
2007-12-31	3518
2008-03-31	805
2008-06-30	4208
2008-09-30	4169
2008-12-31	3628
2009-03-31	5746
2009-06-30	4224
2009-09-30	2820
2009-12-31	2713
2010-03-31	3748
2010-06-30	2890
2010-09-30	3198
2010-12-31	4448
2011-03-31	4692
2011-06-30	4450
2011-09-30	2531
2011-12-31	2381
2012-03-31	2659
2012-06-30	2643
2012-09-30	3289
2012-12-31	2176
2013-03-31	3182
2013-06-30	1720
2013-09-30	3372
2013-12-31	2311
2014-03-31	3432
2014-06-30	1643
2014-09-30	2437
2014-12-31	2376
2015-03-31	2304
2015-06-30	1502
2015-09-30	1353
2015-12-31	965
2016-03-31	1035
2016-06-30	867
2016-09-30	1199
2016-12-31	1199
2017-03-31	1126
2017-06-30	1138
2017-09-30	1054
2017-12-31	1123
2018-03-31	913
2018-06-30	847
2018-09-30	839
2018-12-31	809
2019-03-31	785
2019-06-30	781
2019-09-30	729
2019-12-31	646
2020-03-31	625
2020-06-30	525
2020-09-30	533
2020-12-31	542
2021-03-31	560
2021-06-30	736
2021-09-30	682
2021-12-31	657
2022-03-31	653
2022-06-30	709
2022-09-30	861
2022-12-31	751
2023-03-31	746
2023-06-30	744
2023-09-30	733