Quarter	US dollars
1999-03-31	85
1999-06-30	48
1999-09-30	48
1999-12-31	47
2000-03-31	55
2000-06-30	64
2000-09-30	61
2000-12-31	70
2001-03-31	196
2001-06-30	256
2001-09-30	320
2001-12-31	481
2002-03-31	482
2002-06-30	455
2002-09-30	98
2002-12-31	131
2003-03-31	121
2003-06-30	120
2003-09-30	106
2003-12-31	97
2004-03-31	76
2004-06-30	77
2004-09-30	85
2004-12-31	82
2005-03-31	530
2005-06-30	687
2005-09-30	205
2005-12-31	404
2006-03-31	552
2006-06-30	331
2006-09-30	143
2006-12-31	141
2007-03-31	145
2007-06-30	160
2007-09-30	787
2007-12-31	752
2008-03-31	721
2008-06-30	484
2008-09-30	469
2008-12-31	390
2009-03-31	412
2009-06-30	342
2009-09-30	348
2009-12-31	355
2010-03-31	324
2010-06-30	331
2010-09-30	322
2010-12-31	308
2011-03-31	312
2011-06-30	304
2011-09-30	345
2011-12-31	205
2012-03-31	204
2012-06-30	320
2012-09-30	404
2012-12-31	498
2013-03-31	386
2013-06-30	453
2013-09-30	521
2013-12-31	471
2014-03-31	290
2014-06-30	278
2014-09-30	204
2014-12-31	252
2015-03-31	232
2015-06-30	230
2015-09-30	383
2015-12-31	391
2016-03-31	381
2016-06-30	625
2016-09-30	456
2016-12-31	480
2017-03-31	519
2017-06-30	468
2017-09-30	286
2017-12-31	269
2018-03-31	98
2018-06-30	197
2018-09-30	350
2018-12-31	346
2019-03-31	90
2019-06-30	343
2019-09-30	407
2019-12-31	466
2020-03-31	379
2020-06-30	405
2020-09-30	416
2020-12-31	461
2021-03-31	420
2021-06-30	406
2021-09-30	381
2021-12-31	375
2022-03-31	365
2022-06-30	346
2022-09-30	330
2022-12-31	361
2023-03-31	319
2023-06-30	317
2023-09-30	258