Quarter	US dollars
2004-12-31	3007
2005-03-31	3439
2005-09-30	3819
2007-06-30	7183
2007-12-31	8346
2008-03-31	9435
2008-06-30	9427
2008-09-30	9825
2008-12-31	9204
2009-09-30	8926
2009-12-31	8089
2010-06-30	11732
2010-09-30	11537
2010-12-31	12430
2011-03-31	15225
2011-06-30	16610
2011-09-30	15866
2011-12-31	16301
2012-03-31	15877
2012-06-30	18974
2012-09-30	19918
2012-12-31	22823
2013-03-31	20973
2013-06-30	21448
2013-09-30	18183
2013-12-31	18812
2014-03-31	16540
2014-06-30	18449
2014-09-30	17037
2014-12-31	17785
2015-03-31	16682
2015-06-30	14466
2015-09-30	14356
2015-12-31	12853
2016-03-31	14158
2016-06-30	13685
2016-09-30	14016
2016-12-31	12459
2017-03-31	11893
2017-06-30	13195
2017-09-30	12469
2017-12-31	11292
2018-03-31	11402
2018-06-30	10882
2018-09-30	10066
2018-12-31	8797
2019-03-31	9946
2019-06-30	9970
2019-09-30	8801
2019-12-31	8219
2020-03-31	7536
2020-06-30	6927
2020-09-30	7231
2020-12-31	8001
2021-03-31	8520
2021-06-30	7841
2021-09-30	8236
2021-12-31	7207
2022-03-31	6789
2022-06-30	7012
2022-09-30	5903
2022-12-31	6781
2023-03-31	7036
2023-06-30	7232
2023-09-30	6709