Quarter	US dollars
2004-12-31	-2634
2005-03-31	-4378
2005-06-30	-5198
2005-09-30	-3906
2005-12-31	-4090
2006-03-31	-4064
2006-06-30	-4847
2006-09-30	-5181
2006-12-31	-5300
2007-03-31	-4395
2007-06-30	-7175
2007-09-30	-5833
2007-12-31	-5612
2008-03-31	-4277
2008-06-30	-3582
2008-09-30	-3505
2008-12-31	-4569
2009-03-31	-4325
2009-06-30	-3406
2009-09-30	-2756
2009-12-31	-4234
2010-03-31	-2933
2010-06-30	-3954
2010-09-30	-1780
2010-12-31	-1310
2011-03-31	-5032
2011-06-30	-3174
2011-09-30	-2345
2011-12-31	-4167
2012-03-31	-6041
2012-06-30	-5573
2012-09-30	-4767
2012-12-31	-4137
2013-03-31	-2582
2013-06-30	-4432
2013-09-30	-4236
2013-12-31	-3590
2014-03-31	-3646
2014-06-30	-4626
2014-09-30	-3609
2014-12-31	-4194
2015-03-31	-3249
2015-06-30	-5003
2015-09-30	-3735
2015-12-31	-5479
2016-03-31	-5429
2016-06-30	-6380
2016-09-30	-6728
2016-12-31	-6939
2017-03-31	-5513
2017-06-30	-5553
2017-09-30	-10942
2017-12-31	-9974
2018-03-31	-10452
2018-06-30	-8920
2018-09-30	-8539
2018-12-31	-10586
2019-03-31	-11087
2019-06-30	-11571
2019-09-30	-12440
2019-12-31	-13118
2020-03-31	-13597
2020-06-30	-12203
2020-09-30	-10361
2020-12-31	-10487
2021-03-31	-9816
2021-06-30	-8872
2021-09-30	-9963
2021-12-31	-8596
2022-03-31	-8833
2022-06-30	-8294
2022-09-30	-8412
2022-12-31	-11101
2023-03-31	-10807
2023-06-30	-9012
2023-09-30	-10012