Quarter	US dollars
2004-12-31	6
2005-03-31	4
2005-06-30	4
2005-09-30	4
2005-12-31	3
2006-03-31	3
2006-06-30	4
2006-09-30	24
2006-12-31	2
2007-03-31	14
2007-06-30	14
2007-09-30	10
2007-12-31	8
2008-03-31	2
2008-06-30	8
2008-09-30	287
2008-12-31	55
2009-03-31	85
2009-06-30	91
2009-09-30	142
2009-12-31	163
2010-03-31	36
2010-06-30	54
2010-09-30	68
2010-12-31	52
2011-03-31	139
2011-06-30	106
2011-09-30	164
2011-12-31	161
2012-03-31	272
2012-06-30	205
2012-09-30	431
2012-12-31	671
2013-03-31	531
2013-06-30	300
2013-09-30	293
2013-12-31	197
2014-03-31	85
2014-06-30	101
2014-09-30	117
2014-12-31	150
2015-03-31	134
2015-06-30	182
2015-09-30	127
2015-12-31	159
2016-03-31	224
2016-06-30	215
2016-09-30	117
2016-12-31	137
2017-03-31	136
2017-06-30	125
2017-09-30	127
2017-12-31	112
2018-03-31	143
2018-06-30	285
2018-09-30	132
2018-12-31	176
2019-03-31	95
2019-06-30	308
2019-09-30	193
2019-12-31	361
2020-03-31	368
2020-06-30	388
2020-09-30	372
2020-12-31	262
2021-03-31	146
2021-06-30	141
2021-09-30	171
2021-12-31	325
2022-03-31	473
2022-06-30	401
2022-09-30	302
2022-12-31	158
2023-03-31	152
2023-06-30	168
2023-09-30	271