Quarter	US dollars
2004-12-31	3010
2005-03-31	3724
2005-06-30	1968
2005-09-30	4507
2005-12-31	3866
2006-03-31	4451
2006-06-30	3662
2006-09-30	2109
2006-12-31	945
2007-03-31	1198
2007-06-30	3220
2007-09-30	3553
2007-12-31	3522
2008-03-31	3496
2008-06-30	3208
2008-09-30	3113
2008-12-31	2079
2009-03-31	2763
2009-06-30	3934
2009-09-30	2815
2009-12-31	1403
2010-03-31	1042
2010-06-30	2144
2010-09-30	755
2010-12-31	1052
2011-03-31	1015
2011-06-30	1151
2011-09-30	743
2011-12-31	-113
2012-03-31	-93
2012-06-30	-337
2012-09-30	-1063
2012-12-31	-815
2013-03-31	-1099
2013-06-30	-549
2013-09-30	70
2013-12-31	-1040
2014-03-31	-862
2014-06-30	-456
2014-09-30	-370
2014-12-31	-342
2015-03-31	-239
2015-06-30	-448
2015-09-30	-303
2015-12-31	-539
2016-03-31	-1387
2016-06-30	-1943
2016-09-30	-1474
2016-12-31	-1240
2017-03-31	205
2017-06-30	-334
2017-09-30	232
2017-12-31	1169
2018-03-31	1901
2018-06-30	1374
2018-09-30	781
2018-12-31	-158
2019-03-31	-396
2019-06-30	-381
2019-09-30	-320
2019-12-31	-532
2020-03-31	-484
2020-06-30	-1668
2020-09-30	-246
2020-12-31	49
2021-03-31	-1330
2021-06-30	-1726
2021-09-30	-2431
2021-12-31	-1009
2022-03-31	-1560
2022-06-30	-786
2022-09-30	-1416
2022-12-31	-1044
2023-03-31	-517
2023-06-30	-307
2023-09-30	-850