Quarter	US dollars
2004-12-31	8
2005-03-31	13
2005-06-30	22
2005-09-30	12
2005-12-31	26
2006-03-31	19
2006-06-30	39
2006-09-30	35
2006-12-31	22
2007-03-31	18
2007-06-30	12
2007-09-30	12
2007-12-31	12
2008-03-31	22
2008-06-30	26
2008-09-30	23
2008-12-31	17
2009-03-31	1
2009-06-30	3
2009-09-30	3
2009-12-31	6
2010-03-31	9
2010-06-30	13
2010-09-30	14
2010-12-31	31
2011-03-31	18
2011-06-30	16
2011-09-30	19
2011-12-31	32
2012-03-31	24
2012-06-30	17
2012-09-30	13
2012-12-31	6
2013-03-31	8
2013-06-30	17
2013-09-30	15
2013-12-31	17
2014-03-31	5
2014-06-30	17
2014-09-30	21
2014-12-31	31
2015-03-31	64
2015-06-30	19
2015-09-30	23
2015-12-31	13
2016-03-31	13
2016-06-30	5
2016-09-30	8
2016-12-31	15
2017-03-31	24
2017-06-30	91
2017-09-30	237
2017-12-31	340
2018-03-31	260
2018-06-30	166
2018-09-30	230
2018-12-31	349
2019-03-31	315
2019-06-30	355
2019-09-30	320
2019-12-31	308
2020-03-31	264
2020-06-30	199
2020-09-30	207
2020-12-31	270
2021-03-31	319
2021-06-30	322
2021-09-30	391
2021-12-31	202
2022-03-31	113
2022-06-30	36
2022-09-30	49
2022-12-31	38
2023-03-31	39
2023-06-30	46
2023-09-30	27