Quarter	US dollars
2004-12-31	2423
2005-03-31	3187
2005-06-30	3594
2005-09-30	4243
2005-12-31	2968
2006-03-31	4081
2006-06-30	4228
2006-09-30	5472
2006-12-31	6129
2007-03-31	5048
2007-06-30	4458
2007-09-30	5697
2007-12-31	6602
2008-03-31	8405
2008-06-30	9135
2008-09-30	9787
2008-12-31	6054
2009-03-31	5067
2009-06-30	5782
2009-09-30	4921
2009-12-31	7357
2010-03-31	6912
2010-06-30	8889
2010-09-30	8445
2010-12-31	6909
2011-03-31	6989
2011-06-30	7664
2011-09-30	6873
2011-12-31	6460
2012-03-31	7620
2012-06-30	7404
2012-09-30	7051
2012-12-31	7732
2013-03-31	7888
2013-06-30	8371
2013-09-30	10853
2013-12-31	8710
2014-03-31	3750
2014-06-30	4182
2014-09-30	3935
2014-12-31	5845
2015-03-31	5786
2015-06-30	7177
2015-09-30	8603
2015-12-31	7838
2016-03-31	7257
2016-06-30	8464
2016-09-30	9260
2016-12-31	7582
2017-03-31	5696
2017-06-30	5791
2017-09-30	7985
2017-12-31	7170
2018-03-31	7858
2018-06-30	6888
2018-09-30	8209
2018-12-31	8772
2019-03-31	9543
2019-06-30	10266
2019-09-30	10610
2019-12-31	8486
2020-03-31	9398
2020-06-30	10090
2020-09-30	9756
2020-12-31	9680
2021-03-31	11805
2021-06-30	11673
2021-09-30	10829
2021-12-31	12228
2022-03-31	13344
2022-06-30	12454
2022-09-30	12609
2022-12-31	12354
2023-03-31	12692
2023-06-30	12658
2023-09-30	12576