Quarter	US dollars
2004-12-31	19295
2005-03-31	33969
2005-06-30	17430
2005-09-30	22623
2005-12-31	11881
2006-03-31	12919
2006-06-30	20109
2006-09-30	17060
2006-12-31	15752
2007-03-31	23292
2007-06-30	27464
2007-09-30	24233
2007-12-31	20787
2008-03-31	22828
2008-06-30	25654
2008-09-30	20496
2008-12-31	13728
2009-03-31	13619
2009-06-30	13563
2009-09-30	12735
2009-12-31	14598
2010-03-31	11622
2010-06-30	9695
2010-09-30	8676
2010-12-31	8139
2011-03-31	7938
2011-06-30	7198
2011-09-30	7057
2011-12-31	7194
2012-03-31	3695
2012-06-30	1934
2012-09-30	2573
2012-12-31	2907
2013-03-31	3067
2013-06-30	2835
2013-09-30	2719
2013-12-31	3316
2014-03-31	4660
2014-06-30	5382
2014-09-30	4988
2014-12-31	4896
2015-03-31	5787
2015-06-30	5538
2015-09-30	3990
2015-12-31	3558
2016-03-31	3196
2016-06-30	3745
2016-09-30	2562
2016-12-31	2737
2017-03-31	5340
2017-06-30	6326
2017-09-30	5340
2017-12-31	4298
2018-03-31	5389
2018-06-30	4542
2018-09-30	7077
2018-12-31	5775
2019-03-31	4850
2019-06-30	3440
2019-09-30	4045
2019-12-31	5409
2020-03-31	3240
2020-06-30	2817
2020-09-30	2779
2020-12-31	3399
2021-03-31	3145
2021-06-30	3687
2021-09-30	4450
2021-12-31	3818
2022-03-31	3856
2022-06-30	3894
2022-09-30	3563
2022-12-31	2594
2023-03-31	3951
2023-06-30	9174
2023-09-30	11360