Quarter	US dollars
1999-03-31	-716
1999-06-30	-1597
1999-09-30	-121
1999-12-31	550
2000-03-31	723
2000-06-30	-2263
2000-09-30	-779
2000-12-31	143
2001-03-31	184
2001-06-30	-955
2001-09-30	-765
2001-12-31	1123
2002-03-31	-198
2002-06-30	-845
2002-09-30	-1953
2002-12-31	1110
2003-03-31	-2524
2003-06-30	-718
2003-09-30	1401
2003-12-31	-2225
2004-03-31	4834
2004-06-30	-4389
2004-09-30	-548
2004-12-31	758
2005-03-31	-1657
2005-06-30	1293
2005-09-30	2543
2005-12-31	83
2006-03-31	5895
2006-06-30	1151
2006-09-30	5498
2006-12-31	-3762
2007-03-31	1866
2007-06-30	6340
2007-09-30	-3172
2007-12-31	-637
2008-03-31	1286
2008-06-30	2462
2008-09-30	-1958
2008-12-31	-12458
2009-03-31	1673
2009-06-30	630
2009-09-30	536
2009-12-31	1057
2010-03-31	2190
2010-06-30	-585
2010-09-30	8939
2010-12-31	1214
2011-03-31	2279
2011-06-30	4629
2011-09-30	-6208
2011-12-31	3209
2012-03-31	8836
2012-06-30	-8382
2012-09-30	-1236
2012-12-31	1358
2013-03-31	760
2013-06-30	-3317
2013-09-30	6321
2013-12-31	2243
2014-03-31	-7958
2014-06-30	-806
2014-09-30	-273
2014-12-31	227
2015-03-31	1459
2015-06-30	113
2015-09-30	-1984
2015-12-31	802
2016-03-31	-12725
2016-06-30	-975
2016-09-30	-1683
2016-12-31	-2922
2017-03-31	455
2017-06-30	-1233
2017-09-30	2776
2017-12-31	-1571
2018-03-31	354
2018-06-30	-1477
2018-09-30	2973
2018-12-31	2012
2019-03-31	113
2019-06-30	34
2019-09-30	1835
2019-12-31	-3575
2020-03-31	-308
2020-06-30	-3364
2020-09-30	-2427
2020-12-31	10672
2021-03-31	-2667
2021-06-30	-405
2021-09-30	-891
2021-12-31	15866
2022-03-31	-2448
2022-06-30	-10413
2022-09-30	15201
2022-12-31	3920
2023-03-31	2997
2023-06-30	4085
2023-09-30	-18178