Quarter	US dollars
2004-12-31	4214
2005-03-31	4792
2005-06-30	4390
2005-09-30	5694
2005-12-31	3320
2006-03-31	2935
2006-06-30	3020
2006-09-30	3296
2006-12-31	2493
2007-03-31	4250
2007-06-30	3648
2007-09-30	3301
2007-12-31	3052
2008-03-31	3542
2008-06-30	2740
2008-09-30	2276
2008-12-31	2008
2009-03-31	1981
2009-06-30	1813
2009-09-30	1962
2009-12-31	2897
2010-03-31	2953
2010-06-30	2684
2010-09-30	3977
2010-12-31	3350
2011-03-31	3991
2011-06-30	1936
2011-09-30	2796
2011-12-31	4128
2012-03-31	3255
2012-06-30	2623
2012-09-30	2529
2012-12-31	3268
2013-03-31	3388
2013-06-30	3799
2013-09-30	4058
2013-12-31	5203
2014-03-31	6281
2014-06-30	5733
2014-09-30	6088
2014-12-31	6746
2015-03-31	7493
2015-06-30	6279
2015-09-30	5763
2015-12-31	3416
2016-03-31	4122
2016-06-30	5381
2016-09-30	3302
2016-12-31	2287
2017-03-31	2433
2017-06-30	3303
2017-09-30	3540
2017-12-31	3029
2018-03-31	4154
2018-06-30	2922
2018-09-30	3502
2018-12-31	3615
2019-03-31	3529
2019-06-30	3000
2019-09-30	2927
2019-12-31	3871
2020-03-31	5326
2020-06-30	3611
2020-09-30	5449
2020-12-31	6816
2021-03-31	6643
2021-06-30	5832
2021-09-30	6029
2021-12-31	5794
2022-03-31	6374
2022-06-30	5382
2022-09-30	6126
2022-12-31	5207
2023-03-31	5876
2023-06-30	7030
2023-09-30	8069