Quarter	US dollars
1999-03-31	425
1999-06-30	413
1999-09-30	380
1999-12-31	342
2000-03-31	295
2000-06-30	356
2000-09-30	420
2000-12-31	429
2001-03-31	446
2001-06-30	448
2001-09-30	526
2001-12-31	468
2002-03-31	527
2002-06-30	439
2002-09-30	430
2002-12-31	357
2003-03-31	374
2003-06-30	417
2003-09-30	435
2003-12-31	495
2004-03-31	466
2004-06-30	565
2004-09-30	513
2004-12-31	479
2005-03-31	539
2005-06-30	454
2005-09-30	434
2005-12-31	1388
2006-03-31	1444
2006-06-30	1598
2006-09-30	1800
2006-12-31	1826
2007-03-31	2218
2007-06-30	2004
2007-09-30	4016
2007-12-31	3817
2008-03-31	4607
2008-06-30	5706
2008-09-30	4430
2008-12-31	4071
2009-03-31	3638
2009-06-30	3848
2009-09-30	3697
2009-12-31	3871
2010-03-31	3822
2010-06-30	3492
2010-09-30	3578
2010-12-31	1124
2011-03-31	1274
2011-06-30	1325
2011-09-30	1305
2011-12-31	910
2012-03-31	780
2012-06-30	733
2012-09-30	606
2012-12-31	551
2013-03-31	487
2013-06-30	480
2013-09-30	439
2013-12-31	791
2014-03-31	332
2014-06-30	207
2014-09-30	224
2014-12-31	207
2015-03-31	164
2015-06-30	209
2015-09-30	110
2015-12-31	191
2016-03-31	195
2016-06-30	244
2016-09-30	1565
2016-12-31	1391
2017-03-31	1645
2017-06-30	1549
2017-09-30	184
2017-12-31	231
2018-03-31	66
2018-06-30	63
2018-09-30	64
2018-12-31	31
2019-03-31	104
2019-06-30	113
2019-09-30	116
2019-12-31	164
2020-03-31	132
2020-06-30	137
2020-09-30	171
2020-12-31	140
2021-03-31	139
2021-06-30	133
2021-09-30	57
2021-12-31	61
2022-03-31	67
2022-06-30	47
2022-09-30	45
2022-12-31	43
2023-03-31	48
2023-06-30	152
2023-09-30	105