Quarter	US dollars
2004-12-31	34243
2005-03-31	34074
2005-06-30	33833
2005-09-30	35661
2005-12-31	40579
2006-03-31	41900
2006-06-30	43478
2006-09-30	46580
2006-12-31	50058
2007-03-31	61669
2007-06-30	67828
2007-09-30	77134
2007-12-31	75435
2008-03-31	84185
2008-06-30	91176
2008-09-30	75041
2008-12-31	71135
2009-03-31	69742
2009-06-30	77538
2009-09-30	71089
2009-12-31	70108
2010-03-31	70235
2010-06-30	72801
2010-09-30	79958
2010-12-31	74915
2011-03-31	75573
2011-06-30	76378
2011-09-30	67856
2011-12-31	63613
2012-03-31	61504
2012-06-30	56062
2012-09-30	55845
2012-12-31	46847
2013-03-31	44210
2013-06-30	37526
2013-09-30	37737
2013-12-31	37171
2014-03-31	35110
2014-06-30	35069
2014-09-30	31351
2014-12-31	26829
2015-03-31	6599
2015-06-30	7150
2015-09-30	6157
2015-12-31	6877
2016-03-31	8407
2016-06-30	8001
2016-09-30	7774
2016-12-31	5785
2017-03-31	6903
2017-06-30	5582
2017-09-30	5091
2017-12-31	5268
2018-03-31	4891
2018-06-30	4931
2018-09-30	5725
2018-12-31	5152
2019-03-31	5517
2019-06-30	3885
2019-09-30	3217
2019-12-31	4162
2020-03-31	4773
2020-06-30	4799
2020-09-30	5183
2020-12-31	4736
2021-03-31	4526
2021-06-30	4253
2021-09-30	4812
2021-12-31	2104
2022-03-31	2530
2022-06-30	2733
2022-09-30	2657
2022-12-31	2123
2023-03-31	2863
2023-06-30	3977
2023-09-30	2629