Quarter	US dollars
2004-12-31	5395
2005-03-31	7356
2005-06-30	3694
2005-09-30	8777
2005-12-31	3722
2006-03-31	6109
2006-06-30	4542
2006-09-30	8399
2006-12-31	4006
2007-03-31	4384
2007-06-30	11210
2007-09-30	5739
2007-12-31	6793
2008-03-31	7423
2008-06-30	7939
2008-09-30	5544
2008-12-31	2118
2009-03-31	2436
2009-06-30	2679
2009-09-30	5105
2009-12-31	7485
2010-03-31	11104
2010-06-30	13327
2010-09-30	13398
2010-12-31	14853
2011-03-31	15459
2011-06-30	16859
2011-09-30	14873
2011-12-31	11297
2012-03-31	7724
2012-06-30	8110
2012-09-30	10676
2012-12-31	10996
2013-03-31	13374
2013-06-30	14735
2013-09-30	15663
2013-12-31	17781
2014-03-31	16888
2014-06-30	15300
2014-09-30	16330
2014-12-31	13100
2015-03-31	10996
2015-06-30	9301
2015-09-30	7719
2015-12-31	6877
2016-03-31	9758
2016-06-30	9868
2016-09-30	10689
2016-12-31	10797
2017-03-31	14165
2017-06-30	16499
2017-09-30	15078
2017-12-31	14820
2018-03-31	17120
2018-06-30	16957
2018-09-30	17140
2018-12-31	16773
2019-03-31	16975
2019-06-30	14759
2019-09-30	13504
2019-12-31	13120
2020-03-31	16702
2020-06-30	15148
2020-09-30	15542
2020-12-31	16809
2021-03-31	19730
2021-06-30	20559
2021-09-30	18654
2021-12-31	21962
2022-03-31	20988
2022-06-30	20388
2022-09-30	19545
2022-12-31	16448
2023-03-31	18520
2023-06-30	20571
2023-09-30	21269