Quarter	US dollars
2004-12-31	9678
2005-03-31	13150
2005-06-30	10418
2005-09-30	10593
2005-12-31	9543
2006-03-31	13645
2006-06-30	12476
2006-09-30	13705
2006-12-31	15505
2007-03-31	16106
2007-06-30	16693
2007-09-30	18593
2007-12-31	20713
2008-03-31	19450
2008-06-30	19652
2008-09-30	20833
2008-12-31	13138
2009-03-31	12643
2009-06-30	11725
2009-09-30	14531
2009-12-31	11662
2010-03-31	14262
2010-06-30	12758
2010-09-30	17891
2010-12-31	14021
2011-03-31	15233
2011-06-30	12374
2011-09-30	16450
2011-12-31	11297
2012-03-31	15880
2012-06-30	18941
2012-09-30	20336
2012-12-31	13623
2013-03-31	12192
2013-06-30	13794
2013-09-30	12860
2013-12-31	9471
2014-03-31	7700
2014-06-30	8680
2014-09-30	7563
2014-12-31	5862
2015-03-31	8586
2015-06-30	7887
2015-09-30	7660
2015-12-31	8792
2016-03-31	10451
2016-06-30	10751
2016-09-30	9473
2016-12-31	6588
2017-03-31	6046
2017-06-30	6696
2017-09-30	4317
2017-12-31	6107
2018-03-31	7416
2018-06-30	10787
2018-09-30	6716
2018-12-31	4500
2019-03-31	6557
2019-06-30	6200
2019-09-30	5112
2019-12-31	4974
2020-03-31	5604
2020-06-30	6419
2020-09-30	6047
2020-12-31	6108
2021-03-31	6924
2021-06-30	6717
2021-09-30	7578
2021-12-31	7127
2022-03-31	10873
2022-06-30	7894
2022-09-30	8080
2022-12-31	8281
2023-03-31	9647
2023-06-30	9102
2023-09-30	8843