Quarter	US dollars
2004-12-31	4276
2005-03-31	3783
2005-06-30	4660
2005-09-30	4908
2005-12-31	4297
2006-03-31	5419
2006-06-30	8376
2006-09-30	7434
2006-12-31	4654
2007-03-31	13221
2007-06-30	15750
2007-09-30	15869
2007-12-31	17606
2008-03-31	31122
2008-06-30	42405
2008-09-30	46618
2008-12-31	49738
2009-03-31	45249
2009-06-30	33639
2009-09-30	27530
2009-12-31	25063
2010-03-31	24756
2010-06-30	28531
2010-09-30	27800
2010-12-31	26097
2011-03-31	24683
2011-06-30	25582
2011-09-30	29672
2011-12-31	29769
2012-03-31	20999
2012-06-30	24440
2012-09-30	18462
2012-12-31	15198
2013-03-31	16562
2013-06-30	19024
2013-09-30	21629
2013-12-31	21977
2014-03-31	19484
2014-06-30	15712
2014-09-30	16016
2014-12-31	18048
2015-03-31	18992
2015-06-30	15767
2015-09-30	20136
2015-12-31	15782
2016-03-31	14612
2016-06-30	14932
2016-09-30	11874
2016-12-31	15184
2017-03-31	12149
2017-06-30	8886
2017-09-30	8452
2017-12-31	8494
2018-03-31	8865
2018-06-30	9328
2018-09-30	9173
2018-12-31	7870
2019-03-31	8012
2019-06-30	7692
2019-09-30	10282
2019-12-31	7337
2020-03-31	15472
2020-06-30	10657
2020-09-30	10966
2020-12-31	14725
2021-03-31	11350
2021-06-30	10598
2021-09-30	10806
2021-12-31	9780
2022-03-31	10723
2022-06-30	16668
2022-09-30	24646
2022-12-31	14446
2023-03-31	10769
2023-06-30	13891
2023-09-30	16224