Quarter	US dollars
2004-12-31	3187
2005-03-31	2979
2005-06-30	2461
2005-09-30	2298
2005-12-31	2336
2006-03-31	4034
2006-06-30	5367
2006-09-30	5470
2006-12-31	6666
2007-03-31	7025
2007-06-30	7069
2007-09-30	7783
2007-12-31	8115
2008-03-31	9055
2008-06-30	9093
2008-09-30	8543
2008-12-31	7346
2009-03-31	11847
2009-06-30	12970
2009-09-30	12476
2009-12-31	12967
2010-03-31	7406
2010-06-30	6465
2010-09-30	6951
2010-12-31	6808
2011-03-31	6726
2011-06-30	7098
2011-09-30	5814
2011-12-31	5274
2012-03-31	5918
2012-06-30	5918
2012-09-30	5862
2012-12-31	5749
2013-03-31	5136
2013-06-30	4523
2013-09-30	4860
2013-12-31	5924
2014-03-31	6521
2014-06-30	6440
2014-09-30	5721
2014-12-31	6090
2015-03-31	5848
2015-06-30	7471
2015-09-30	7936
2015-12-31	7550
2016-03-31	7461
2016-06-30	5402
2016-09-30	4964
2016-12-31	4483
2017-03-31	3863
2017-06-30	3970
2017-09-30	4045
2017-12-31	4123
2018-03-31	3995
2018-06-30	3517
2018-09-30	3439
2018-12-31	3254
2019-03-31	3273
2019-06-30	2924
2019-09-30	2797
2019-12-31	3148
2020-03-31	3096
2020-06-30	3201
2020-09-30	3937
2020-12-31	3208
2021-03-31	3281
2021-06-30	3084
2021-09-30	2935
2021-12-31	2844
2022-03-31	2660
2022-06-30	2693
2022-09-30	2469
2022-12-31	2580
2023-03-31	2673
2023-06-30	2979
2023-09-30	3093