Quarter	US dollars
2004-12-31	33909
2005-03-31	28190
2005-06-30	27725
2005-09-30	22320
2005-12-31	25097
2006-03-31	27187
2006-06-30	31061
2006-09-30	25770
2006-12-31	25480
2007-03-31	35519
2007-06-30	34671
2007-09-30	36351
2007-12-31	33967
2008-03-31	36487
2008-06-30	30906
2008-09-30	27655
2008-12-31	25617
2009-03-31	27365
2009-06-30	27073
2009-09-30	25597
2009-12-31	31728
2010-03-31	19895
2010-06-30	18839
2010-09-30	14906
2010-12-31	14365
2011-03-31	13754
2011-06-30	17864
2011-09-30	10094
2011-12-31	8412
2012-03-31	6551
2012-06-30	6337
2012-09-30	4682
2012-12-31	8660
2013-03-31	5723
2013-06-30	6335
2013-09-30	7417
2013-12-31	6319
2014-03-31	6749
2014-06-30	7700
2014-09-30	7800
2014-12-31	4423
2015-03-31	8680
2015-06-30	2136
2015-09-30	7184
2015-12-31	5982
2016-03-31	8263
2016-06-30	2080
2016-09-30	2146
2016-12-31	1112
2017-03-31	2958
2017-06-30	2265
2017-09-30	4749
2017-12-31	2133
2018-03-31	7732
2018-06-30	6450
2018-09-30	6695
2018-12-31	7795
2019-03-31	10256
2019-06-30	12900
2019-09-30	13564
2019-12-31	11863
2020-03-31	8662
2020-06-30	7698
2020-09-30	8929
2020-12-31	7112
2021-03-31	3384
2021-06-30	4756
2021-09-30	3181
2021-12-31	2373
2022-03-31	2640
2022-06-30	3108
2022-09-30	1024
2022-12-31	1240
2023-03-31	-2760
2023-06-30	1817
2023-09-30	4569