Quarter	US dollars
2004-12-31	29641
2005-03-31	33294
2005-06-30	38442
2005-09-30	39816
2005-12-31	32255
2006-03-31	41014
2006-06-30	33570
2006-09-30	34298
2006-12-31	37050
2007-03-31	42080
2007-06-30	39418
2007-09-30	44250
2007-12-31	38012
2008-03-31	37522
2008-06-30	39342
2008-09-30	33062
2008-12-31	22158
2009-03-31	16908
2009-06-30	19692
2009-09-30	16009
2009-12-31	14410
2010-03-31	11268
2010-06-30	13614
2010-09-30	13483
2010-12-31	11787
2011-03-31	17987
2011-06-30	5660
2011-09-30	5975
2011-12-31	7673
2012-03-31	9056
2012-06-30	7408
2012-09-30	4042
2012-12-31	4962
2013-03-31	3662
2013-06-30	2982
2013-09-30	2742
2013-12-31	3692
2014-03-31	3160
2014-06-30	4987
2014-09-30	3996
2014-12-31	5151
2015-03-31	4127
2015-06-30	3876
2015-09-30	2870
2015-12-31	2116
2016-03-31	2492
2016-06-30	2709
2016-09-30	2406
2016-12-31	1774
2017-03-31	2384
2017-06-30	1964
2017-09-30	2071
2017-12-31	2181
2018-03-31	2706
2018-06-30	3949
2018-09-30	4349
2018-12-31	2042
2019-03-31	2788
2019-06-30	3210
2019-09-30	4201
2019-12-31	1997
2020-03-31	3975
2020-06-30	2422
2020-09-30	2227
2020-12-31	2032
2021-03-31	3092
2021-06-30	2606
2021-09-30	2726
2021-12-31	1394
2022-03-31	2352
2022-06-30	1795
2022-09-30	4145
2022-12-31	3126
2023-03-31	3280
2023-06-30	2999
2023-09-30	3922