Quarter	US dollars
2004-12-31	23311
2005-03-31	25369
2005-06-30	28357
2005-09-30	26944
2005-12-31	25565
2006-03-31	30581
2006-06-30	34306
2006-09-30	32968
2006-12-31	31371
2007-03-31	35964
2007-06-30	39259
2007-09-30	37117
2007-12-31	35794
2008-03-31	36655
2008-06-30	34445
2008-09-30	23962
2008-12-31	28222
2009-03-31	28276
2009-06-30	31108
2009-09-30	32128
2009-12-31	30232
2010-03-31	27998
2010-06-30	24442
2010-09-30	26366
2010-12-31	24384
2011-03-31	33190
2011-06-30	32059
2011-09-30	27054
2011-12-31	21686
2012-03-31	23943
2012-06-30	19099
2012-09-30	22983
2012-12-31	23693
2013-03-31	23690
2013-06-30	23697
2013-09-30	24123
2013-12-31	25346
2014-03-31	24021
2014-06-30	25770
2014-09-30	22814
2014-12-31	19950
2015-03-31	20158
2015-06-30	21673
2015-09-30	18004
2015-12-31	17436
2016-03-31	16464
2016-06-30	14364
2016-09-30	13954
2016-12-31	11508
2017-03-31	9485
2017-06-30	10527
2017-09-30	9174
2017-12-31	11479
2018-03-31	12071
2018-06-30	8039
2018-09-30	8138
2018-12-31	9023
2019-03-31	10354
2019-06-30	10037
2019-09-30	9725
2019-12-31	10686
2020-03-31	7505
2020-06-30	9511
2020-09-30	8141
2020-12-31	8830
2021-03-31	8560
2021-06-30	8218
2021-09-30	10497
2021-12-31	9849
2022-03-31	7048
2022-06-30	4001
2022-09-30	1992
2022-12-31	3481
2023-03-31	5006
2023-06-30	6436
2023-09-30	7613