Quarter	US dollars
2004-12-31	4347
2005-03-31	4157
2005-06-30	3158
2005-09-30	3225
2005-12-31	3110
2006-03-31	4250
2006-06-30	3564
2006-09-30	2909
2006-12-31	3076
2007-03-31	6202
2007-06-30	5387
2007-09-30	5609
2007-12-31	4973
2008-03-31	5058
2008-06-30	4983
2008-09-30	5692
2008-12-31	4310
2009-03-31	4255
2009-06-30	4089
2009-09-30	3678
2009-12-31	3947
2010-03-31	4009
2010-06-30	4047
2010-09-30	4303
2010-12-31	5290
2011-03-31	5186
2011-06-30	2392
2011-09-30	3890
2011-12-31	2661
2012-03-31	2870
2012-06-30	2493
2012-09-30	2416
2012-12-31	1656
2013-03-31	1691
2013-06-30	1145
2013-09-30	983
2013-12-31	909
2014-03-31	2491
2014-06-30	2344
2014-09-30	2099
2014-12-31	2516
2015-03-31	2481
2015-06-30	2425
2015-09-30	2764
2015-12-31	2454
2016-03-31	2503
2016-06-30	3312
2016-09-30	2531
2016-12-31	2478
2017-03-31	3208
2017-06-30	5328
2017-09-30	3703
2017-12-31	2644
2018-03-31	3079
2018-06-30	4622
2018-09-30	4470
2018-12-31	2733
2019-03-31	4561
2019-06-30	3608
2019-09-30	3339
2019-12-31	3045
2020-03-31	2946
2020-06-30	3012
2020-09-30	2982
2020-12-31	2941
2021-03-31	3329
2021-06-30	6314
2021-09-30	3204
2021-12-31	2807
2022-03-31	3008
2022-06-30	7776
2022-09-30	2873
2022-12-31	3294
2023-03-31	3439
2023-06-30	3363
2023-09-30	3133