Quarter	US dollars
2004-12-31	33867
2005-03-31	38613
2005-06-30	44083
2005-09-30	45237
2005-12-31	36066
2006-03-31	46981
2006-06-30	39348
2006-09-30	39496
2006-12-31	43676
2007-03-31	53698
2007-06-30	47658
2007-09-30	52117
2007-12-31	48347
2008-03-31	50459
2008-06-30	47534
2008-09-30	40204
2008-12-31	26120
2009-03-31	19151
2009-06-30	22619
2009-09-30	18595
2009-12-31	16768
2010-03-31	12944
2010-06-30	15037
2010-09-30	13170
2010-12-31	11918
2011-03-31	18425
2011-06-30	5708
2011-09-30	5939
2011-12-31	7424
2012-03-31	8900
2012-06-30	6638
2012-09-30	3706
2012-12-31	3783
2013-03-31	3440
2013-06-30	2789
2013-09-30	2644
2013-12-31	3552
2014-03-31	2921
2014-06-30	4603
2014-09-30	4267
2014-12-31	4064
2015-03-31	4028
2015-06-30	4170
2015-09-30	3038
2015-12-31	1965
2016-03-31	2410
2016-06-30	2592
2016-09-30	2440
2016-12-31	2901
2017-03-31	3252
2017-06-30	3787
2017-09-30	3964
2017-12-31	3415
2018-03-31	3497
2018-06-30	5260
2018-09-30	4927
2018-12-31	2735
2019-03-31	3515
2019-06-30	3476
2019-09-30	3892
2019-12-31	1531
2020-03-31	3417
2020-06-30	2348
2020-09-30	2297
2020-12-31	2031
2021-03-31	3079
2021-06-30	2624
2021-09-30	2708
2021-12-31	1419
2022-03-31	2309
2022-06-30	1751
2022-09-30	3877
2022-12-31	3093
2023-03-31	3249
2023-06-30	3025
2023-09-30	3955