Quarter	US dollars
2004-12-31	6
2005-03-31	8
2005-06-30	5
2005-09-30	177
2005-12-31	149
2006-03-31	213
2006-06-30	187
2006-09-30	207
2006-12-31	204
2007-03-31	224
2007-06-30	227
2007-09-30	230
2007-12-31	265
2008-03-31	252
2008-06-30	285
2008-09-30	303
2008-12-31	272
2009-03-31	255
2009-06-30	291
2009-09-30	309
2009-12-31	289
2010-03-31	238
2010-06-30	277
2010-09-30	298
2010-12-31	330
2011-03-31	351
2011-06-30	372
2011-09-30	418
2011-12-31	428
2012-03-31	384
2012-06-30	359
2012-09-30	691
2012-12-31	850
2013-03-31	615
2013-06-30	626
2013-09-30	1023
2013-12-31	1025
2014-03-31	475
2014-06-30	397
2014-09-30	464
2014-12-31	592
2015-03-31	539
2015-06-30	503
2015-09-30	600
2015-12-31	528
2016-03-31	515
2016-06-30	11
2016-09-30	9
2016-12-31	28
2017-03-31	45
2017-06-30	4
2017-09-30	3
2017-12-31	4
2018-03-31	25
2018-06-30	8
2018-09-30	39
2018-12-31	28
2019-03-31	44
2019-06-30	28
2019-09-30	33
2019-12-31	32
2020-03-31	38
2020-06-30	25
2020-09-30	30
2020-12-31	23
2021-03-31	34
2021-06-30	61
2021-09-30	20
2021-12-31	15
2022-03-31	11
2022-06-30	14
2022-09-30	18
2022-12-31	14
2023-03-31	11
2023-06-30	15
2023-09-30	14