Quarter	US dollars
1999-03-31	94
1999-06-30	-524
1999-09-30	-639
1999-12-31	-497
2000-03-31	863
2000-06-30	-224
2000-09-30	1538
2000-12-31	334
2001-03-31	-1214
2001-06-30	-1174
2001-09-30	950
2001-12-31	-130
2002-03-31	1134
2002-06-30	-542
2002-09-30	3
2002-12-31	1078
2003-03-31	-1322
2003-06-30	82
2003-09-30	4034
2003-12-31	2294
2004-03-31	5175
2004-06-30	3224
2004-09-30	-1994
2004-12-31	5997
2005-03-31	5251
2005-06-30	2735
2005-09-30	4351
2005-12-31	12586
2006-03-31	14126
2006-06-30	-6119
2006-09-30	5751
2006-12-31	439
2007-03-31	15071
2007-06-30	12209
2007-09-30	15194
2007-12-31	-431
2008-03-31	1734
2008-06-30	1078
2008-09-30	152
2008-12-31	-23550
2009-03-31	-9446
2009-06-30	5029
2009-09-30	-7900
2009-12-31	-2756
2010-03-31	2236
2010-06-30	806
2010-09-30	10059
2010-12-31	-8944
2011-03-31	11900
2011-06-30	2707
2011-09-30	-15777
2011-12-31	5382
2012-03-31	-643
2012-06-30	4977
2012-09-30	5840
2012-12-31	2814
2013-03-31	19914
2013-06-30	-8817
2013-09-30	-940
2013-12-31	-5400
2014-03-31	-8934
2014-06-30	4165
2014-09-30	-3141
2014-12-31	-10181
2015-03-31	-6250
2015-06-30	69
2015-09-30	-4256
2015-12-31	-3269
2016-03-31	-440
2016-06-30	2150
2016-09-30	-1643
2016-12-31	-7101
2017-03-31	5176
2017-06-30	-6071
2017-09-30	525
2017-12-31	2365
2018-03-31	307
2018-06-30	-5072
2018-09-30	-5474
2018-12-31	980
2019-03-31	-235
2019-06-30	-6283
2019-09-30	-1162
2019-12-31	3386
2020-03-31	-5026
2020-06-30	-4612
2020-09-30	4112
2020-12-31	-1542
2021-03-31	-4670
2021-06-30	-2926
2021-09-30	668
2021-12-31	2054
2022-03-31	1164
2022-06-30	904
2022-09-30	3724
2022-12-31	-7754
2023-03-31	-332
2023-06-30	1892
2023-09-30	578