Quarter	US dollars
2004-12-31	0
2005-03-31	2
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	0
2006-12-31	10
2007-03-31	10
2007-06-30	10
2007-09-30	10
2007-12-31	10
2008-03-31	18
2008-06-30	24
2008-09-30	14
2008-12-31	17
2009-03-31	0
2009-06-30	15
2009-09-30	14
2009-12-31	15
2010-03-31	15
2010-06-30	27
2010-09-30	30
2010-12-31	60
2011-03-31	65
2011-06-30	64
2011-09-30	520
2011-12-31	502
2012-03-31	1032
2012-06-30	1020
2012-09-30	1179
2012-12-31	1284
2013-03-31	3234
2013-06-30	1661
2013-09-30	1581
2013-12-31	1388
2014-03-31	1339
2014-06-30	1441
2014-09-30	1389
2014-12-31	1286
2015-03-31	1200
2015-06-30	1183
2015-09-30	1227
2015-12-31	1021
2016-03-31	886
2016-06-30	854
2016-09-30	789
2016-12-31	659
2017-03-31	653
2017-06-30	548
2017-09-30	394
2017-12-31	361
2018-03-31	317
2018-06-30	268
2018-09-30	562
2018-12-31	221
2019-03-31	211
2019-06-30	164
2019-09-30	158
2019-12-31	116
2020-03-31	89
2020-06-30	80
2020-09-30	44
2020-12-31	23
2021-03-31	22
2021-06-30	22
2021-09-30	31
2021-12-31	18
2022-03-31	20
2022-06-30	20
2022-09-30	21
2022-12-31	21
2023-03-31	21
2023-06-30	21
2023-09-30	26