Quarter	US dollars
2004-12-31	4095
2005-03-31	4331
2005-06-30	4047
2005-09-30	3895
2005-12-31	3753
2006-03-31	3899
2006-06-30	4089
2006-09-30	4189
2006-12-31	4413
2007-03-31	4744
2007-06-30	4898
2007-09-30	5069
2007-12-31	5371
2008-03-31	5521
2008-06-30	5602
2008-09-30	5091
2008-12-31	5010
2009-03-31	4934
2009-06-30	5360
2009-09-30	5622
2009-12-31	5555
2010-03-31	5675
2010-06-30	5340
2010-09-30	5820
2010-12-31	5844
2011-03-31	6056
2011-06-30	6435
2011-09-30	5850
2011-12-31	5742
2012-03-31	6031
2012-06-30	5586
2012-09-30	5723
2012-12-31	5804
2013-03-31	5459
2013-06-30	5757
2013-09-30	6184
2013-12-31	6175
2014-03-31	6431
2014-06-30	6552
2014-09-30	5661
2014-12-31	5702
2015-03-31	4773
2015-06-30	4804
2015-09-30	4892
2015-12-31	4794
2016-03-31	4831
2016-06-30	4800
2016-09-30	4840
2016-12-31	4556
2017-03-31	4791
2017-06-30	5112
2017-09-30	4859
2017-12-31	4733
2018-03-31	4999
2018-06-30	4735
2018-09-30	4600
2018-12-31	4488
2019-03-31	4678
2019-06-30	4714
2019-09-30	4509
2019-12-31	4898
2020-03-31	4897
2020-06-30	5042
2020-09-30	5232
2020-12-31	5809
2021-03-31	5292
2021-06-30	5250
2021-09-30	5097
2021-12-31	5929
2022-03-31	5956
2022-06-30	5708
2022-09-30	5287
2022-12-31	5690
2023-03-31	5639
2023-06-30	5734
2023-09-30	5523