Quarter	US dollars
1999-03-31	347
1999-06-30	349
1999-09-30	354
1999-12-31	357
2000-03-31	359
2000-06-30	360
2000-09-30	362
2000-12-31	367
2001-03-31	91
2001-06-30	90
2001-09-30	269
2001-12-31	272
2002-03-31	271
2002-06-30	276
2002-09-30	275
2002-12-31	277
2003-03-31	277
2003-06-30	274
2003-09-30	274
2003-12-31	102
2004-03-31	98
2004-06-30	101
2004-09-30	102
2004-12-31	110
2005-03-31	103
2005-06-30	102
2005-09-30	93
2005-12-31	88
2006-03-31	89
2006-06-30	92
2006-09-30	92
2006-12-31	126
2007-03-31	42
2007-06-30	43
2007-09-30	44
2007-12-31	73
2008-03-31	326
2008-06-30	321
2008-09-30	427
2008-12-31	524
2009-03-31	489
2009-06-30	590
2009-09-30	455
2009-12-31	428
2010-03-31	402
2010-06-30	367
2010-09-30	303
2010-12-31	328
2011-03-31	10
2011-06-30	9
2011-09-30	10
2011-12-31	10
2012-03-31	11
2012-06-30	10
2012-09-30	17
2012-12-31	11
2013-03-31	11
2013-06-30	10
2013-09-30	9
2013-12-31	9
2014-03-31	14
2014-06-30	16
2014-09-30	175
2014-12-31	994
2015-03-31	994
2015-06-30	498
2015-09-30	488
2015-12-31	409
2016-03-31	446
2016-06-30	473
2016-09-30	421
2016-12-31	387
2017-03-31	319
2017-06-30	287
2017-09-30	300
2017-12-31	334
2018-03-31	289
2018-06-30	205
2018-09-30	153
2018-12-31	277
2019-03-31	369
2019-06-30	517
2019-09-30	597
2019-12-31	501
2020-03-31	359
2020-06-30	471
2020-09-30	261
2020-12-31	242
2021-03-31	715
2021-06-30	768
2021-09-30	834
2021-12-31	1130
2022-03-31	1437
2022-06-30	1576
2022-09-30	1519
2022-12-31	1938
2023-03-31	1260
2023-06-30	1696
2023-09-30	1847