Quarter	US dollars
2004-12-31	595
2005-03-31	590
2005-06-30	529
2005-09-30	456
2005-12-31	874
2006-03-31	826
2006-06-30	991
2006-09-30	785
2006-12-31	861
2007-03-31	1200
2007-06-30	1491
2007-09-30	1373
2007-12-31	1543
2008-03-31	1582
2008-06-30	2165
2008-09-30	1652
2008-12-31	1397
2009-03-31	1032
2009-06-30	1164
2009-09-30	678
2009-12-31	654
2010-03-31	632
2010-06-30	738
2010-09-30	1358
2010-12-31	2530
2011-03-31	2521
2011-06-30	2452
2011-09-30	2536
2011-12-31	2478
2012-03-31	10357
2012-06-30	10612
2012-09-30	10074
2012-12-31	11696
2013-03-31	22242
2013-06-30	23262
2013-09-30	21928
2013-12-31	17244
2014-03-31	18810
2014-06-30	16122
2014-09-30	19518
2014-12-31	17195
2015-03-31	18490
2015-06-30	21174
2015-09-30	18702
2015-12-31	15578
2016-03-31	17822
2016-06-30	16506
2016-09-30	16089
2016-12-31	16171
2017-03-31	16394
2017-06-30	15493
2017-09-30	15612
2017-12-31	14472
2018-03-31	13489
2018-06-30	14815
2018-09-30	10565
2018-12-31	16415
2019-03-31	17851
2019-06-30	18295
2019-09-30	18675
2019-12-31	18269
2020-03-31	19457
2020-06-30	17165
2020-09-30	15780
2020-12-31	13650
2021-03-31	13542
2021-06-30	14024
2021-09-30	14075
2021-12-31	14291
2022-03-31	15247
2022-06-30	14264
2022-09-30	11592
2022-12-31	10172
2023-03-31	9652
2023-06-30	7738
2023-09-30	7843