Quarter	US dollars
2004-12-31	1645
2005-03-31	1420
2005-06-30	850
2005-09-30	230
2005-12-31	342
2006-03-31	475
2006-06-30	344
2006-09-30	404
2006-12-31	1104
2007-03-31	388
2007-06-30	582
2007-09-30	1000
2007-12-31	1362
2008-03-31	1801
2008-06-30	3302
2008-09-30	4687
2008-12-31	1187
2009-03-31	1274
2009-06-30	2775
2009-09-30	3899
2009-12-31	4095
2010-03-31	6153
2010-06-30	5121
2010-09-30	5204
2010-12-31	5611
2011-03-31	9471
2011-06-30	6784
2011-09-30	5454
2011-12-31	5057
2012-03-31	4732
2012-06-30	6420
2012-09-30	8591
2012-12-31	8469
2013-03-31	7575
2013-06-30	5477
2013-09-30	5401
2013-12-31	5324
2014-03-31	5482
2014-06-30	3686
2014-09-30	4650
2014-12-31	4628
2015-03-31	5294
2015-06-30	6177
2015-09-30	5280
2015-12-31	6550
2016-03-31	7963
2016-06-30	7773
2016-09-30	7504
2016-12-31	7572
2017-03-31	8507
2017-06-30	7209
2017-09-30	8102
2017-12-31	9164
2018-03-31	9756
2018-06-30	10053
2018-09-30	10381
2018-12-31	10727
2019-03-31	10700
2019-06-30	12048
2019-09-30	12957
2019-12-31	12786
2020-03-31	10829
2020-06-30	14799
2020-09-30	14351
2020-12-31	17880
2021-03-31	18251
2021-06-30	15346
2021-09-30	15745
2021-12-31	16264
2022-03-31	17504
2022-06-30	15812
2022-09-30	12066
2022-12-31	12521
2023-03-31	13291
2023-06-30	13522
2023-09-30	13182