Quarter	US dollars
2004-12-31	11452
2005-03-31	18685
2005-06-30	13080
2005-09-30	23138
2005-12-31	13709
2006-03-31	14958
2006-06-30	18392
2006-09-30	22971
2006-12-31	25326
2007-03-31	24332
2007-06-30	27104
2007-09-30	30369
2007-12-31	24203
2008-03-31	21594
2008-06-30	17923
2008-09-30	20639
2008-12-31	16341
2009-03-31	13415
2009-06-30	9309
2009-09-30	9540
2009-12-31	7730
2010-03-31	11512
2010-06-30	11141
2010-09-30	9587
2010-12-31	14010
2011-03-31	17417
2011-06-30	11755
2011-09-30	14967
2011-12-31	9181
2012-03-31	9617
2012-06-30	9354
2012-09-30	10229
2012-12-31	10089
2013-03-31	10246
2013-06-30	9140
2013-09-30	8478
2013-12-31	10294
2014-03-31	12450
2014-06-30	10055
2014-09-30	8748
2014-12-31	8658
2015-03-31	9575
2015-06-30	9335
2015-09-30	10417
2015-12-31	7743
2016-03-31	8933
2016-06-30	10260
2016-09-30	8959
2016-12-31	8391
2017-03-31	10834
2017-06-30	8564
2017-09-30	10129
2017-12-31	11174
2018-03-31	9935
2018-06-30	8554
2018-09-30	8552
2018-12-31	9306
2019-03-31	8585
2019-06-30	7637
2019-09-30	8272
2019-12-31	8454
2020-03-31	7411
2020-06-30	7286
2020-09-30	9378
2020-12-31	10538
2021-03-31	8865
2021-06-30	9451
2021-09-30	9254
2021-12-31	8269
2022-03-31	6872
2022-06-30	7801
2022-09-30	9076
2022-12-31	7846
2023-03-31	7897
2023-06-30	6410
2023-09-30	6914