Quarter	US dollars
2004-12-31	2529
2005-03-31	2244
2005-06-30	2316
2005-09-30	3446
2005-12-31	4736
2006-03-31	5131
2006-06-30	4646
2006-09-30	4291
2006-12-31	6650
2007-03-31	8334
2007-06-30	9378
2007-09-30	8040
2007-12-31	9196
2008-03-31	9339
2008-06-30	8585
2008-09-30	8878
2008-12-31	7634
2009-03-31	6165
2009-06-30	5456
2009-09-30	4396
2009-12-31	3961
2010-03-31	3872
2010-06-30	5059
2010-09-30	5012
2010-12-31	5680
2011-03-31	6813
2011-06-30	8073
2011-09-30	5141
2011-12-31	5786
2012-03-31	4479
2012-06-30	4307
2012-09-30	5147
2012-12-31	4981
2013-03-31	4910
2013-06-30	4952
2013-09-30	5067
2013-12-31	5029
2014-03-31	6206
2014-06-30	6193
2014-09-30	5561
2014-12-31	9916
2015-03-31	6968
2015-06-30	5247
2015-09-30	5421
2015-12-31	8256
2016-03-31	6190
2016-06-30	6591
2016-09-30	8138
2016-12-31	6234
2017-03-31	6056
2017-06-30	8573
2017-09-30	8673
2017-12-31	9599
2018-03-31	13300
2018-06-30	15469
2018-09-30	14104
2018-12-31	19325
2019-03-31	18525
2019-06-30	20402
2019-09-30	20667
2019-12-31	21680
2020-03-31	19979
2020-06-30	21253
2020-09-30	22029
2020-12-31	25481
2021-03-31	25070
2021-06-30	26895
2021-09-30	25378
2021-12-31	35108
2022-03-31	31928
2022-06-30	30904
2022-09-30	29581
2022-12-31	30281
2023-03-31	32894
2023-06-30	33270
2023-09-30	35908