Quarter	US dollars
2004-12-31	4389
2005-03-31	5571
2005-06-30	5311
2005-09-30	10445
2005-12-31	9412
2006-03-31	11432
2006-06-30	11481
2006-09-30	13107
2006-12-31	12396
2007-03-31	15828
2007-06-30	17103
2007-09-30	21376
2007-12-31	28121
2008-03-31	29075
2008-06-30	30735
2008-09-30	27701
2008-12-31	29060
2009-03-31	31555
2009-06-30	33865
2009-09-30	34305
2009-12-31	36398
2010-03-31	42879
2010-06-30	39042
2010-09-30	42181
2010-12-31	50309
2011-03-31	53837
2011-06-30	53123
2011-09-30	50010
2011-12-31	47671
2012-03-31	48408
2012-06-30	51739
2012-09-30	52709
2012-12-31	53511
2013-03-31	48476
2013-06-30	44932
2013-09-30	46657
2013-12-31	41613
2014-03-31	43945
2014-06-30	41411
2014-09-30	40895
2014-12-31	40674
2015-03-31	39003
2015-06-30	39787
2015-09-30	37428
2015-12-31	37188
2016-03-31	38773
2016-06-30	38141
2016-09-30	43168
2016-12-31	36819
2017-03-31	39087
2017-06-30	39269
2017-09-30	35754
2017-12-31	37193
2018-03-31	40193
2018-06-30	36740
2018-09-30	36281
2018-12-31	38582
2019-03-31	42113
2019-06-30	41385
2019-09-30	41878
2019-12-31	43814
2020-03-31	45622
2020-06-30	46286
2020-09-30	44089
2020-12-31	50305
2021-03-31	48745
2021-06-30	49367
2021-09-30	50854
2021-12-31	58598
2022-03-31	52681
2022-06-30	48592
2022-09-30	49428
2022-12-31	44534
2023-03-31	47592
2023-06-30	44981
2023-09-30	39585