Quarter	US dollars
2004-12-31	4402
2005-03-31	6847
2005-06-30	5281
2005-09-30	5078
2005-12-31	6288
2006-03-31	7658
2006-06-30	6805
2006-09-30	6720
2006-12-31	8865
2007-03-31	8324
2007-06-30	8577
2007-09-30	8223
2007-12-31	8153
2008-03-31	10760
2008-06-30	8215
2008-09-30	8798
2008-12-31	5733
2009-03-31	6983
2009-06-30	8952
2009-09-30	8379
2009-12-31	5876
2010-03-31	6535
2010-06-30	4523
2010-09-30	5489
2010-12-31	3721
2011-03-31	7127
2011-06-30	6992
2011-09-30	7082
2011-12-31	5801
2012-03-31	7567
2012-06-30	8094
2012-09-30	8968
2012-12-31	10021
2013-03-31	9757
2013-06-30	10344
2013-09-30	10617
2013-12-31	11669
2014-03-31	12501
2014-06-30	11628
2014-09-30	12125
2014-12-31	11928
2015-03-31	12344
2015-06-30	10328
2015-09-30	12787
2015-12-31	9791
2016-03-31	10325
2016-06-30	8646
2016-09-30	9109
2016-12-31	7414
2017-03-31	7490
2017-06-30	6409
2017-09-30	4912
2017-12-31	4446
2018-03-31	5897
2018-06-30	5403
2018-09-30	6226
2018-12-31	8000
2019-03-31	9091
2019-06-30	8008
2019-09-30	7040
2019-12-31	6399
2020-03-31	7113
2020-06-30	7376
2020-09-30	7200
2020-12-31	7688
2021-03-31	8369
2021-06-30	9118
2021-09-30	8243
2021-12-31	5447
2022-03-31	7263
2022-06-30	6220
2022-09-30	5558
2022-12-31	5281
2023-03-31	6051
2023-06-30	6862
2023-09-30	6380