Quarter	US dollars
2004-12-31	3909
2005-03-31	10412
2005-06-30	4675
2005-09-30	13418
2005-12-31	5612
2006-03-31	5422
2006-06-30	8185
2006-09-30	12412
2006-12-31	14351
2007-03-31	11289
2007-06-30	11842
2007-09-30	15097
2007-12-31	10408
2008-03-31	7982
2008-06-30	3345
2008-09-30	7519
2008-12-31	1600
2009-03-31	322
2009-06-30	1838
2009-09-30	1649
2009-12-31	728
2010-03-31	4611
2010-06-30	4438
2010-09-30	2858
2010-12-31	7395
2011-03-31	7045
2011-06-30	3720
2011-09-30	4253
2011-12-31	861
2012-03-31	959
2012-06-30	740
2012-09-30	799
2012-12-31	1644
2013-03-31	2678
2013-06-30	2298
2013-09-30	2666
2013-12-31	4762
2014-03-31	6516
2014-06-30	3346
2014-09-30	1971
2014-12-31	1583
2015-03-31	3366
2015-06-30	3342
2015-09-30	2728
2015-12-31	1763
2016-03-31	2916
2016-06-30	4605
2016-09-30	2865
2016-12-31	3888
2017-03-31	6041
2017-06-30	4080
2017-09-30	6138
2017-12-31	5711
2018-03-31	4851
2018-06-30	3179
2018-09-30	3698
2018-12-31	4293
2019-03-31	4743
2019-06-30	3391
2019-09-30	3044
2019-12-31	3205
2020-03-31	2075
2020-06-30	2176
2020-09-30	2740
2020-12-31	1788
2021-03-31	2082
2021-06-30	1943
2021-09-30	2544
2021-12-31	2957
2022-03-31	3392
2022-06-30	3343
2022-09-30	3640
2022-12-31	3929
2023-03-31	2736
2023-06-30	2590
2023-09-30	1893