Quarter	US dollars
1999-09-30	837
1999-12-31	678
2000-03-31	668
2000-06-30	666
2000-09-30	645
2000-12-31	115
2001-03-31	121
2001-06-30	119
2001-09-30	192
2001-12-31	112
2002-03-31	119
2002-06-30	113
2002-09-30	115
2002-12-31	263
2003-03-31	109
2003-06-30	134
2003-09-30	119
2003-12-31	142
2004-03-31	184
2004-06-30	180
2004-09-30	192
2004-12-31	209
2005-03-31	200
2005-06-30	221
2005-09-30	198
2005-12-31	247
2006-03-31	199
2006-06-30	209
2006-09-30	166
2006-12-31	172
2007-03-31	162
2007-06-30	160
2007-09-30	223
2007-12-31	235
2008-03-31	939
2008-06-30	1627
2008-09-30	1353
2008-12-31	599
2009-03-31	460
2009-06-30	414
2009-09-30	565
2009-12-31	535
2010-03-31	405
2010-06-30	448
2010-09-30	599
2010-12-31	476
2011-03-31	327
2011-06-30	424
2011-09-30	384
2011-12-31	587
2012-03-31	447
2012-06-30	590
2012-09-30	308
2012-12-31	240
2013-03-31	323
2013-06-30	227
2013-09-30	204
2013-12-31	349
2014-03-31	259
2014-06-30	423
2014-09-30	419
2014-12-31	150
2015-03-31	356
2015-06-30	320
2015-09-30	283
2015-12-31	377
2016-03-31	450
2016-06-30	2017
2016-09-30	884
2016-12-31	1374
2017-03-31	1607
2017-06-30	3028
2017-09-30	5128
2017-12-31	6080
2018-03-31	6001
2018-06-30	5997
2018-09-30	2829
2018-12-31	29284
2019-03-31	19324
2019-06-30	3350
2019-09-30	8339
2019-12-31	18588
2020-03-31	4491
2020-06-30	3247
2020-09-30	3008
2020-12-31	18894
2021-03-31	3446
2021-06-30	3097
2021-09-30	4044
2021-12-31	14676
2022-03-31	7266
2022-06-30	10966
2022-09-30	7282
2022-12-31	13943
2023-03-31	5304
2023-06-30	4815
2023-09-30	4464
2023-12-31	4600