Quarter	US dollars
1999-03-31	40
1999-06-30	42
1999-09-30	20
1999-12-31	48
2000-03-31	67
2000-06-30	43
2000-09-30	51
2000-12-31	29
2001-03-31	27
2001-06-30	30
2001-09-30	25
2001-12-31	35
2002-03-31	29
2002-06-30	17
2002-09-30	17
2002-12-31	37
2003-03-31	33
2003-06-30	61
2003-09-30	71
2003-12-31	18
2004-03-31	64
2004-06-30	33
2004-09-30	66
2004-12-31	68
2005-03-31	74
2005-06-30	76
2005-09-30	166
2005-12-31	267
2006-03-31	308
2006-06-30	517
2006-09-30	376
2006-12-31	55
2007-03-31	122
2007-06-30	220
2007-09-30	374
2007-12-31	243
2008-03-31	205
2008-06-30	252
2008-09-30	137
2008-12-31	112
2009-03-31	21
2009-06-30	27
2009-09-30	97
2009-12-31	93
2010-03-31	109
2010-06-30	217
2010-09-30	88
2010-12-31	143
2011-03-31	220
2011-06-30	130
2011-09-30	160
2011-12-31	347
2012-03-31	357
2012-06-30	320
2012-09-30	136
2012-12-31	354
2013-03-31	386
2013-06-30	376
2013-09-30	276
2013-12-31	322
2014-03-31	83
2014-06-30	151
2014-09-30	177
2014-12-31	313
2015-03-31	398
2015-06-30	477
2015-09-30	829
2015-12-31	424
2016-03-31	479
2016-06-30	415
2016-09-30	378
2016-12-31	416
2017-03-31	497
2017-06-30	569
2017-09-30	642
2017-12-31	531
2018-03-31	554
2018-06-30	548
2018-09-30	492
2018-12-31	466
2019-03-31	413
2019-06-30	441
2019-09-30	350
2019-12-31	253
2020-03-31	243
2020-06-30	490
2020-09-30	505
2020-12-31	535
2021-03-31	583
2021-06-30	447
2021-09-30	693
2021-12-31	575
2022-03-31	480
2022-06-30	602
2022-09-30	883
2022-12-31	1036
2023-03-31	1147
2023-06-30	655
2023-09-30	776