Quarter	US dollars
2004-12-31	6645
2005-03-31	6293
2005-06-30	5152
2005-09-30	6375
2005-12-31	5905
2006-03-31	5909
2006-06-30	5755
2006-09-30	10524
2006-12-31	6354
2007-03-31	11464
2007-06-30	9819
2007-09-30	14686
2007-12-31	11929
2008-03-31	10744
2008-06-30	11859
2008-09-30	7460
2008-12-31	11846
2009-03-31	9673
2009-06-30	11108
2009-09-30	10661
2009-12-31	10005
2010-03-31	9055
2010-06-30	10352
2010-09-30	12658
2010-12-31	22172
2011-03-31	30489
2011-06-30	22742
2011-09-30	19670
2011-12-31	14405
2012-03-31	13943
2012-06-30	13440
2012-09-30	13137
2012-12-31	15630
2013-03-31	16933
2013-06-30	17988
2013-09-30	17010
2013-12-31	18531
2014-03-31	18567
2014-06-30	16193
2014-09-30	16217
2014-12-31	17039
2015-03-31	11261
2015-06-30	6323
2015-09-30	8576
2015-12-31	8133
2016-03-31	11152
2016-06-30	10402
2016-09-30	8722
2016-12-31	9562
2017-03-31	11124
2017-06-30	11683
2017-09-30	12320
2017-12-31	9719
2018-03-31	10812
2018-06-30	10881
2018-09-30	12291
2018-12-31	11598
2019-03-31	8673
2019-06-30	13837
2019-09-30	11060
2019-12-31	7984
2020-03-31	11953
2020-06-30	12511
2020-09-30	7807
2020-12-31	8948
2021-03-31	10387
2021-06-30	7768
2021-09-30	10296
2021-12-31	10012
2022-03-31	12949
2022-06-30	13215
2022-09-30	12141
2022-12-31	9729
2023-03-31	12584
2023-06-30	11138
2023-09-30	10792