Quarter	US dollars
2004-12-31	14802
2005-03-31	10605
2005-06-30	11597
2005-09-30	8011
2005-12-31	3894
2006-03-31	2248
2006-06-30	1019
2006-09-30	1184
2006-12-31	4900
2007-03-31	9206
2007-06-30	16394
2007-09-30	9729
2007-12-31	7187
2008-03-31	11019
2008-06-30	10886
2008-09-30	4710
2008-12-31	3984
2009-03-31	2303
2009-06-30	2874
2009-09-30	2869
2009-12-31	3595
2010-03-31	4996
2010-06-30	15013
2010-09-30	18101
2010-12-31	17394
2011-03-31	21889
2011-06-30	22180
2011-09-30	25314
2011-12-31	21095
2012-03-31	11238
2012-06-30	8332
2012-09-30	8771
2012-12-31	5394
2013-03-31	2556
2013-06-30	3969
2013-09-30	5412
2013-12-31	3426
2014-03-31	3791
2014-06-30	5172
2014-09-30	5677
2014-12-31	4820
2015-03-31	2790
2015-06-30	3854
2015-09-30	6186
2015-12-31	7970
2016-03-31	6122
2016-06-30	7468
2016-09-30	6134
2016-12-31	6820
2017-03-31	7712
2017-06-30	7785
2017-09-30	7721
2017-12-31	6790
2018-03-31	10499
2018-06-30	10465
2018-09-30	11227
2018-12-31	11076
2019-03-31	11821
2019-06-30	19540
2019-09-30	17672
2019-12-31	16324
2020-03-31	18711
2020-06-30	23223
2020-09-30	14466
2020-12-31	16212
2021-03-31	15577
2021-06-30	15065
2021-09-30	15466
2021-12-31	17395
2022-03-31	19713
2022-06-30	17203
2022-09-30	14848
2022-12-31	18066
2023-03-31	22691
2023-06-30	17240
2023-09-30	18440