Quarter	US dollars
2004-12-31	670
2005-03-31	1274
2005-06-30	1217
2005-09-30	1622
2005-12-31	1293
2006-03-31	1042
2006-06-30	1115
2006-09-30	1231
2006-12-31	2407
2007-03-31	2383
2007-06-30	2271
2007-09-30	1852
2007-12-31	1473
2008-03-31	1648
2008-06-30	2322
2008-09-30	1620
2008-12-31	1534
2009-03-31	2317
2009-06-30	2495
2009-09-30	3133
2009-12-31	1418
2010-03-31	1784
2010-06-30	973
2010-09-30	1933
2010-12-31	1049
2011-03-31	3475
2011-06-30	3654
2011-09-30	3138
2011-12-31	3452
2012-03-31	3212
2012-06-30	3526
2012-09-30	4536
2012-12-31	4858
2013-03-31	4260
2013-06-30	4464
2013-09-30	4353
2013-12-31	5081
2014-03-31	5894
2014-06-30	5451
2014-09-30	5194
2014-12-31	5176
2015-03-31	5204
2015-06-30	4527
2015-09-30	6244
2015-12-31	5522
2016-03-31	5346
2016-06-30	4931
2016-09-30	4335
2016-12-31	4096
2017-03-31	3166
2017-06-30	3527
2017-09-30	2088
2017-12-31	1997
2018-03-31	2492
2018-06-30	2061
2018-09-30	2959
2018-12-31	3020
2019-03-31	2629
2019-06-30	3146
2019-09-30	2612
2019-12-31	3156
2020-03-31	3805
2020-06-30	3747
2020-09-30	3704
2020-12-31	4632
2021-03-31	4079
2021-06-30	4042
2021-09-30	2375
2021-12-31	2120
2022-03-31	2752
2022-06-30	2566
2022-09-30	1659
2022-12-31	1362
2023-03-31	917
2023-06-30	1514
2023-09-30	1823