Quarter	US dollars
2004-12-31	9154
2005-03-31	14286
2005-06-30	21462
2005-09-30	28099
2005-12-31	34591
2006-03-31	53079
2006-06-30	67694
2006-09-30	73217
2006-12-31	86803
2007-03-31	108328
2007-06-30	115533
2007-09-30	146697
2007-12-31	174558
2008-03-31	245184
2008-06-30	229888
2008-09-30	200654
2008-12-31	172692
2009-03-31	151487
2009-06-30	143351
2009-09-30	112824
2009-12-31	74862
2010-03-31	63201
2010-06-30	47941
2010-09-30	39170
2010-12-31	35156
2011-03-31	41066
2011-06-30	39013
2011-09-30	48585
2011-12-31	51864
2012-03-31	-10079
2012-06-30	-8795
2012-09-30	-9181
2012-12-31	-1321
2013-03-31	-1316
2013-06-30	-969
2013-09-30	-2837
2013-12-31	-3635
2014-03-31	-2493
2014-06-30	-1633
2014-09-30	-1613
2014-12-31	1896
2015-03-31	2255
2015-06-30	-71
2015-09-30	-147
2015-12-31	242
2016-03-31	-950
2016-06-30	-876
2016-09-30	-1238
2016-12-31	-33
2017-03-31	-298
2017-06-30	1038
2017-09-30	1025
2017-12-31	613
2018-03-31	-101
2018-06-30	62
2018-09-30	113
2018-12-31	-428
2019-03-31	-4
2019-06-30	1838
2019-09-30	2981
2019-12-31	-469
2020-03-31	597
2020-06-30	-929
2020-09-30	-1332
2020-12-31	-1338
2021-03-31	-1300
2021-06-30	-1596
2021-09-30	-1054
2021-12-31	-1799
2022-03-31	-1216
2022-06-30	-2034
2022-09-30	-2392
2022-12-31	-2046
2023-03-31	-2680
2023-06-30	-1867
2023-09-30	-1450