Quarter	US dollars
2004-12-31	4800
2005-03-31	2766
2005-06-30	3080
2005-09-30	3355
2005-12-31	3098
2006-03-31	4900
2006-06-30	4942
2006-09-30	7256
2006-12-31	7554
2007-03-31	10615
2007-06-30	11599
2007-09-30	11568
2007-12-31	9431
2008-03-31	13229
2008-06-30	13318
2008-09-30	9871
2008-12-31	8801
2009-03-31	7054
2009-06-30	10207
2009-09-30	11820
2009-12-31	8725
2010-03-31	7411
2010-06-30	7583
2010-09-30	7430
2010-12-31	6420
2011-03-31	6180
2011-06-30	6890
2011-09-30	6498
2011-12-31	5071
2012-03-31	4855
2012-06-30	5310
2012-09-30	5166
2012-12-31	5618
2013-03-31	3903
2013-06-30	3805
2013-09-30	3878
2013-12-31	3006
2014-03-31	2303
2014-06-30	2722
2014-09-30	2467
2014-12-31	1322
2015-03-31	1220
2015-06-30	832
2015-09-30	957
2015-12-31	639
2016-03-31	1188
2016-06-30	1381
2016-09-30	1321
2016-12-31	2320
2017-03-31	1218
2017-06-30	2967
2017-09-30	2023
2017-12-31	1046
2018-03-31	1782
2018-06-30	2729
2018-09-30	2327
2018-12-31	2318
2019-03-31	2414
2019-06-30	3281
2019-09-30	3382
2019-12-31	2280
2020-03-31	3283
2020-06-30	2630
2020-09-30	1609
2020-12-31	1043
2021-03-31	1242
2021-06-30	1459
2021-09-30	1456
2021-12-31	1450
2022-03-31	1837
2022-06-30	1768
2022-09-30	2390
2022-12-31	2134
2023-03-31	2609
2023-06-30	3737
2023-09-30	3062