Quarter	US dollars
1999-03-31	29
1999-06-30	29
1999-09-30	101
1999-12-31	20
2000-03-31	90
2000-06-30	88
2000-09-30	85
2000-12-31	52
2001-03-31	62
2001-06-30	64
2001-09-30	58
2001-12-31	60
2002-03-31	96
2002-06-30	96
2002-09-30	144
2002-12-31	134
2003-03-31	76
2003-06-30	151
2003-09-30	143
2003-12-31	140
2004-03-31	117
2004-06-30	109
2004-09-30	166
2004-12-31	145
2005-03-31	212
2005-06-30	182
2005-09-30	198
2005-12-31	149
2006-03-31	244
2006-06-30	315
2006-09-30	154
2006-12-31	190
2007-03-31	199
2007-06-30	247
2007-09-30	194
2007-12-31	238
2008-03-31	126
2008-06-30	122
2008-09-30	28
2008-12-31	2
2009-03-31	2
2009-06-30	3
2009-09-30	1
2009-12-31	206
2010-03-31	356
2010-06-30	396
2010-09-30	417
2010-12-31	637
2011-03-31	504
2011-06-30	530
2011-09-30	934
2011-12-31	1048
2012-03-31	375
2012-06-30	206
2012-09-30	1226
2012-12-31	1186
2013-03-31	447
2013-06-30	1105
2013-09-30	1569
2013-12-31	1482
2014-03-31	1029
2014-06-30	1237
2014-09-30	1215
2014-12-31	547
2015-03-31	922
2015-06-30	1357
2015-09-30	228
2015-12-31	603
2016-03-31	605
2016-06-30	570
2016-09-30	690
2016-12-31	661
2017-03-31	1006
2017-06-30	1216
2017-09-30	1544
2017-12-31	1622
2018-03-31	1430
2018-06-30	1313
2018-09-30	1363
2018-12-31	1466
2019-03-31	1649
2019-06-30	1888
2019-09-30	1967
2019-12-31	1685
2020-03-31	1618
2020-06-30	1154
2020-09-30	1133
2020-12-31	999
2021-03-31	787
2021-06-30	648
2021-09-30	702
2021-12-31	666
2022-03-31	625
2022-06-30	523
2022-09-30	322
2022-12-31	467
2023-03-31	826
2023-06-30	912
2023-09-30	745