Quarter	US dollars
1999-09-30	863
1999-12-31	578
2000-03-31	-5656
2000-06-30	5572
2000-09-30	3178
2000-12-31	4545
2001-03-31	-3206
2001-06-30	24
2001-09-30	-1362
2001-12-31	-2437
2002-03-31	-140
2002-06-30	1017
2002-09-30	-598
2002-12-31	-7139
2003-03-31	-993
2003-06-30	-1443
2003-09-30	2370
2003-12-31	-3177
2004-03-31	-257
2004-06-30	671
2004-09-30	-215
2004-12-31	1302
2005-03-31	303
2005-06-30	833
2005-09-30	-733
2005-12-31	526
2006-03-31	43
2006-06-30	-2130
2006-09-30	2617
2006-12-31	663
2007-03-31	-1522
2007-06-30	2338
2007-09-30	-2997
2007-12-31	1689
2008-03-31	632
2008-06-30	-1003
2008-09-30	4534
2008-12-31	808
2009-03-31	3409
2009-06-30	-4347
2009-09-30	11658
2009-12-31	376
2010-03-31	5045
2010-06-30	2205
2010-09-30	1779
2010-12-31	1321
2011-03-31	4838
2011-06-30	4531
2011-09-30	2304
2011-12-31	1096
2012-03-31	1369
2012-06-30	5064
2012-09-30	893
2012-12-31	2751
2013-03-31	3401
2013-06-30	1888
2013-09-30	785
2013-12-31	2136
2014-03-31	3500
2014-06-30	-447
2014-09-30	1010
2014-12-31	3866
2015-03-31	20388
2015-06-30	-928
2015-09-30	6641
2015-12-31	3264
2016-03-31	2832
2016-06-30	4671
2016-09-30	3026
2016-12-31	-1308
2017-03-31	5040
2017-06-30	3813
2017-09-30	869
2017-12-31	3548
2018-03-31	3559
2018-06-30	3602
2018-09-30	126
2018-12-31	13233
2019-03-31	-5922
2019-06-30	-4559
2019-09-30	-3627
2019-12-31	18504
2020-03-31	-8592
2020-06-30	-478
2020-09-30	-7807
2020-12-31	9548
2021-03-31	-1650
2021-06-30	-2786
2021-09-30	28085
2021-12-31	3061
2022-03-31	1327
2022-06-30	-5121
2022-09-30	-4051
2022-12-31	6103
2023-03-31	-3608
2023-06-30	1051
2023-09-30	976
2023-12-31	145