Quarter	US dollars
2004-12-31	5812
2005-03-31	7630
2005-06-30	7699
2005-09-30	6467
2005-12-31	7680
2006-03-31	7953
2006-06-30	8679
2006-09-30	8848
2006-12-31	10372
2007-03-31	13535
2007-06-30	10981
2007-09-30	12349
2007-12-31	12479
2008-03-31	14342
2008-06-30	12960
2008-09-30	13973
2008-12-31	8620
2009-03-31	7968
2009-06-30	8053
2009-09-30	7490
2009-12-31	5983
2010-03-31	5122
2010-06-30	5024
2010-09-30	4044
2010-12-31	3474
2011-03-31	3317
2011-06-30	3977
2011-09-30	3002
2011-12-31	4085
2012-03-31	2760
2012-06-30	4216
2012-09-30	4380
2012-12-31	4124
2013-03-31	2417
2013-06-30	3126
2013-09-30	3190
2013-12-31	2785
2014-03-31	2174
2014-06-30	4011
2014-09-30	3165
2014-12-31	4248
2015-03-31	4254
2015-06-30	3067
2015-09-30	4633
2015-12-31	3804
2016-03-31	3067
2016-06-30	1473
2016-09-30	1187
2016-12-31	1922
2017-03-31	2150
2017-06-30	2123
2017-09-30	2668
2017-12-31	1864
2018-03-31	2553
2018-06-30	3116
2018-09-30	3342
2018-12-31	3704
2019-03-31	1740
2019-06-30	2330
2019-09-30	1882
2019-12-31	2303
2020-03-31	3922
2020-06-30	3421
2020-09-30	3266
2020-12-31	3576
2021-03-31	4375
2021-06-30	3542
2021-09-30	3131
2021-12-31	4435
2022-03-31	5344
2022-06-30	7306
2022-09-30	3414
2022-12-31	4072
2023-03-31	5157
2023-06-30	7078
2023-09-30	6582