Quarter	US dollars
2004-12-31	3206
2005-03-31	3178
2005-06-30	3452
2005-09-30	4594
2005-12-31	4334
2006-03-31	5179
2006-06-30	6225
2006-09-30	4784
2006-12-31	5333
2007-03-31	6686
2007-06-30	7434
2007-09-30	7732
2007-12-31	7585
2008-03-31	8381
2008-06-30	12239
2008-09-30	14955
2008-12-31	12823
2009-03-31	14524
2009-06-30	13955
2009-09-30	15951
2009-12-31	12634
2010-03-31	12038
2010-06-30	13626
2010-09-30	13436
2010-12-31	15062
2011-03-31	14469
2011-06-30	16278
2011-09-30	13586
2011-12-31	13323
2012-03-31	14124
2012-06-30	13835
2012-09-30	11857
2012-12-31	13846
2013-03-31	11245
2013-06-30	10271
2013-09-30	11663
2013-12-31	12550
2014-03-31	13805
2014-06-30	14006
2014-09-30	12966
2014-12-31	15210
2015-03-31	17176
2015-06-30	17764
2015-09-30	16248
2015-12-31	14689
2016-03-31	14152
2016-06-30	16142
2016-09-30	15293
2016-12-31	13496
2017-03-31	14336
2017-06-30	13259
2017-09-30	13856
2017-12-31	14537
2018-03-31	15916
2018-06-30	15866
2018-09-30	18006
2018-12-31	16990
2019-03-31	16388
2019-06-30	16368
2019-09-30	15892
2019-12-31	15868
2020-03-31	17978
2020-06-30	18492
2020-09-30	21400
2020-12-31	20726
2021-03-31	20894
2021-06-30	20225
2021-09-30	18430
2021-12-31	19478
2022-03-31	17490
2022-06-30	16381
2022-09-30	20903
2022-12-31	21176
2023-03-31	22850
2023-06-30	23019
2023-09-30	19967