Quarter	US dollars
2004-12-31	5086
2005-03-31	5057
2005-06-30	4919
2005-09-30	4668
2005-12-31	5133
2006-03-31	6442
2006-06-30	5282
2006-09-30	6264
2006-12-31	6051
2007-03-31	7051
2007-06-30	6354
2007-09-30	7801
2007-12-31	6986
2008-03-31	9472
2008-06-30	6932
2008-09-30	7346
2008-12-31	7671
2009-03-31	7511
2009-06-30	7906
2009-09-30	8895
2009-12-31	9606
2010-03-31	9868
2010-06-30	10255
2010-09-30	12286
2010-12-31	11519
2011-03-31	12803
2011-06-30	11801
2011-09-30	10898
2011-12-31	11175
2012-03-31	10822
2012-06-30	9979
2012-09-30	9888
2012-12-31	11179
2013-03-31	11202
2013-06-30	10655
2013-09-30	10291
2013-12-31	9500
2014-03-31	9700
2014-06-30	10342
2014-09-30	11144
2014-12-31	10339
2015-03-31	10587
2015-06-30	10526
2015-09-30	9512
2015-12-31	10056
2016-03-31	10037
2016-06-30	9623
2016-09-30	9624
2016-12-31	8701
2017-03-31	10047
2017-06-30	8551
2017-09-30	8539
2017-12-31	9241
2018-03-31	10418
2018-06-30	8916
2018-09-30	8625
2018-12-31	8200
2019-03-31	9582
2019-06-30	8972
2019-09-30	9431
2019-12-31	9614
2020-03-31	9191
2020-06-30	11121
2020-09-30	9245
2020-12-31	10177
2021-03-31	10165
2021-06-30	9507
2021-09-30	9080
2021-12-31	9842
2022-03-31	10006
2022-06-30	9481
2022-09-30	8333
2022-12-31	8548
2023-03-31	9765
2023-06-30	9260
2023-09-30	8671