Quarter	US dollars
2004-12-31	8154
2005-03-31	7713
2005-06-30	6111
2005-09-30	6258
2005-12-31	6181
2006-03-31	7004
2006-06-30	8320
2006-09-30	7004
2006-12-31	7601
2007-03-31	8239
2007-06-30	9103
2007-09-30	8347
2007-12-31	9325
2008-03-31	10691
2008-06-30	8611
2008-09-30	10359
2008-12-31	8621
2009-03-31	7701
2009-06-30	7504
2009-09-30	7515
2009-12-31	7641
2010-03-31	3141
2010-06-30	2876
2010-09-30	2946
2010-12-31	3508
2011-03-31	3379
2011-06-30	4963
2011-09-30	5043
2011-12-31	4771
2012-03-31	4077
2012-06-30	4847
2012-09-30	4929
2012-12-31	5124
2013-03-31	5462
2013-06-30	5982
2013-09-30	5566
2013-12-31	4390
2014-03-31	5326
2014-06-30	6900
2014-09-30	5639
2014-12-31	5293
2015-03-31	5201
2015-06-30	4554
2015-09-30	4952
2015-12-31	3764
2016-03-31	4362
2016-06-30	3970
2016-09-30	4260
2016-12-31	3600
2017-03-31	3993
2017-06-30	5426
2017-09-30	5531
2017-12-31	9652
2018-03-31	9183
2018-06-30	9022
2018-09-30	8290
2018-12-31	9360
2019-03-31	9412
2019-06-30	9873
2019-09-30	10281
2019-12-31	8975
2020-03-31	9336
2020-06-30	9350
2020-09-30	10249
2020-12-31	7975
2021-03-31	8991
2021-06-30	8501
2021-09-30	9853
2021-12-31	10500
2022-03-31	14901
2022-06-30	12951
2022-09-30	11987
2022-12-31	12510
2023-03-31	12886
2023-06-30	12561
2023-09-30	13888