Quarter	US dollars
2004-12-31	3191
2005-03-31	2737
2005-06-30	3280
2005-09-30	50673
2005-12-31	54238
2006-03-31	60590
2006-06-30	55624
2006-09-30	54154
2006-12-31	61638
2007-03-31	63942
2007-06-30	68033
2007-09-30	75742
2007-12-31	80174
2008-03-31	71439
2008-06-30	78766
2008-09-30	74306
2008-12-31	66501
2009-03-31	68802
2009-06-30	80736
2009-09-30	82770
2009-12-31	82752
2010-03-31	85938
2010-06-30	81654
2010-09-30	87406
2010-12-31	95150
2011-03-31	93051
2011-06-30	94433
2011-09-30	83493
2011-12-31	79609
2012-03-31	88714
2012-06-30	83876
2012-09-30	82313
2012-12-31	83110
2013-03-31	76377
2013-06-30	70451
2013-09-30	71050
2013-12-31	69756
2014-03-31	70945
2014-06-30	70959
2014-09-30	68971
2014-12-31	68155
2015-03-31	68715
2015-06-30	72154
2015-09-30	69251
2015-12-31	68118
2016-03-31	62078
2016-06-30	61054
2016-09-30	65347
2016-12-31	65307
2017-03-31	69316
2017-06-30	12520
2017-09-30	13148
2017-12-31	12967
2018-03-31	12694
2018-06-30	9795
2018-09-30	9888
2018-12-31	11500
2019-03-31	12062
2019-06-30	13415
2019-09-30	12555
2019-12-31	13037
2020-03-31	10070
2020-06-30	8884
2020-09-30	8964
2020-12-31	9673
2021-03-31	8858
2021-06-30	9408
2021-09-30	9570
2021-12-31	9666
2022-03-31	11354
2022-06-30	9086
2022-09-30	8729
2022-12-31	9908
2023-03-31	9145
2023-06-30	9254
2023-09-30	8483