Quarter	US dollars
2004-12-31	4086
2005-03-31	6208
2005-06-30	5983
2005-09-30	7839
2005-12-31	7314
2006-03-31	5755
2006-06-30	6748
2006-09-30	5266
2006-12-31	6934
2007-03-31	7367
2007-06-30	10028
2007-09-30	7932
2007-12-31	7938
2008-03-31	9025
2008-06-30	8522
2008-09-30	7579
2008-12-31	8614
2009-03-31	6581
2009-06-30	7131
2009-09-30	5796
2009-12-31	6065
2010-03-31	6053
2010-06-30	8094
2010-09-30	8166
2010-12-31	8142
2011-03-31	8206
2011-06-30	6877
2011-09-30	5696
2011-12-31	6344
2012-03-31	5416
2012-06-30	5183
2012-09-30	9815
2012-12-31	9875
2013-03-31	9028
2013-06-30	8694
2013-09-30	10116
2013-12-31	7514
2014-03-31	9619
2014-06-30	8926
2014-09-30	7586
2014-12-31	8186
2015-03-31	6568
2015-06-30	8385
2015-09-30	9214
2015-12-31	6900
2016-03-31	6855
2016-06-30	7252
2016-09-30	7944
2016-12-31	7336
2017-03-31	6899
2017-06-30	7799
2017-09-30	8067
2017-12-31	8329
2018-03-31	7696
2018-06-30	7547
2018-09-30	7969
2018-12-31	21845
2019-03-31	20815
2019-06-30	25680
2019-09-30	22499
2019-12-31	13119
2020-03-31	18592
2020-06-30	14068
2020-09-30	13632
2020-12-31	15198
2021-03-31	16624
2021-06-30	15241
2021-09-30	13445
2021-12-31	7933
2022-03-31	9978
2022-06-30	15396
2022-09-30	11375
2022-12-31	12083
2023-03-31	13364
2023-06-30	13868
2023-09-30	13733