Quarter	US dollars
2004-12-31	8
2005-03-31	8
2005-06-30	4
2005-09-30	4
2005-12-31	5
2006-03-31	5
2006-06-30	4
2006-09-30	4
2006-12-31	4
2007-03-31	6
2007-06-30	6
2007-09-30	6
2007-12-31	16
2008-03-31	30
2008-06-30	48
2008-09-30	48
2008-12-31	63
2009-03-31	64
2009-06-30	64
2009-09-30	38
2009-12-31	150
2010-03-31	200
2010-06-30	192
2010-09-30	183
2010-12-31	175
2011-03-31	208
2011-06-30	193
2011-09-30	174
2011-12-31	158
2012-03-31	144
2012-06-30	143
2012-09-30	142
2012-12-31	234
2013-03-31	222
2013-06-30	191
2013-09-30	167
2013-12-31	152
2014-03-31	123
2014-06-30	190
2014-09-30	186
2014-12-31	186
2015-03-31	235
2015-06-30	225
2015-09-30	241
2015-12-31	141
2016-03-31	138
2016-06-30	153
2016-09-30	140
2016-12-31	166
2017-03-31	156
2017-06-30	190
2017-09-30	142
2017-12-31	161
2018-03-31	135
2018-06-30	162
2018-09-30	190
2018-12-31	106
2019-03-31	173
2019-06-30	103
2019-09-30	43
2019-12-31	61
2020-03-31	79
2020-06-30	15
2020-09-30	143
2020-12-31	19
2021-03-31	33
2021-06-30	30
2021-09-30	30
2021-12-31	36
2022-03-31	33
2022-06-30	40
2022-09-30	44
2022-12-31	28
2023-03-31	29
2023-06-30	46
2023-09-30	77