Quarter	US dollars
2004-12-31	25
2005-03-31	34
2005-06-30	43
2005-09-30	55
2005-12-31	57
2006-03-31	47
2006-06-30	44
2006-09-30	45
2006-12-31	45
2007-03-31	14
2007-06-30	12
2007-09-30	10
2007-12-31	10
2008-03-31	10
2008-06-30	8
2008-09-30	9
2008-12-31	7
2009-03-31	7
2009-06-30	7
2009-09-30	6
2009-12-31	15
2010-03-31	15
2010-06-30	10
2010-09-30	13
2010-12-31	5
2011-03-31	5
2011-06-30	5
2011-09-30	0
2011-12-31	3
2012-03-31	2
2012-06-30	2
2012-09-30	2
2012-12-31	2
2013-03-31	102
2013-06-30	100
2013-09-30	100
2013-12-31	101
2014-03-31	102
2014-06-30	103
2014-09-30	201
2014-12-31	331
2015-03-31	260
2015-06-30	315
2015-09-30	304
2015-12-31	448
2016-03-31	388
2016-06-30	440
2016-09-30	482
2016-12-31	470
2017-03-31	433
2017-06-30	296
2017-09-30	280
2017-12-31	469
2018-03-31	472
2018-06-30	463
2018-09-30	484
2018-12-31	483
2019-03-31	463
2019-06-30	442
2019-09-30	402
2019-12-31	390
2020-03-31	380
2020-06-30	274
2020-09-30	271
2020-12-31	257
2021-03-31	258
2021-06-30	249
2021-09-30	262
2021-12-31	272
2022-03-31	263
2022-06-30	245
2022-09-30	219
2022-12-31	186
2023-03-31	158
2023-06-30	137
2023-09-30	131