Quarter	US dollars
2004-12-31	3008
2005-03-31	3493
2005-06-30	3797
2005-09-30	3500
2005-12-31	2965
2006-03-31	2980
2006-06-30	2855
2006-09-30	2858
2006-12-31	3857
2007-03-31	3377
2007-06-30	3559
2007-09-30	3400
2007-12-31	3888
2008-03-31	3979
2008-06-30	4291
2008-09-30	4008
2008-12-31	3608
2009-03-31	3270
2009-06-30	3415
2009-09-30	3395
2009-12-31	2987
2010-03-31	3215
2010-06-30	3362
2010-09-30	3502
2010-12-31	3388
2011-03-31	3612
2011-06-30	3924
2011-09-30	3801
2011-12-31	4148
2012-03-31	4619
2012-06-30	5040
2012-09-30	5704
2012-12-31	4977
2013-03-31	5136
2013-06-30	5043
2013-09-30	4853
2013-12-31	5449
2014-03-31	5515
2014-06-30	5969
2014-09-30	5799
2014-12-31	6023
2015-03-31	6059
2015-06-30	5694
2015-09-30	3996
2015-12-31	3894
2016-03-31	3803
2016-06-30	3596
2016-09-30	3804
2016-12-31	4424
2017-03-31	3549
2017-06-30	2249
2017-09-30	3279
2017-12-31	3653
2018-03-31	3983
2018-06-30	3726
2018-09-30	3721
2018-12-31	3971
2019-03-31	4958
2019-06-30	4347
2019-09-30	4101
2019-12-31	4384
2020-03-31	4835
2020-06-30	4570
2020-09-30	4441
2020-12-31	2334
2021-03-31	2561
2021-06-30	1646
2021-09-30	1425
2021-12-31	1597
2022-03-31	1407
2022-06-30	1313
2022-09-30	929
2022-12-31	875
2023-03-31	1487
2023-06-30	1230
2023-09-30	1358