Quarter	US dollars
1999-06-30	54303
1999-09-30	-47829
1999-12-31	-27412
2000-03-31	93655
2000-06-30	9430
2000-09-30	20286
2000-12-31	3338
2001-03-31	134350
2001-06-30	-15201
2001-09-30	-17401
2001-12-31	-19860
2002-03-31	730
2002-06-30	12246
2002-09-30	52318
2002-12-31	25564
2003-03-31	88623
2003-06-30	34302
2003-09-30	-2414
2003-12-31	-21216
2004-03-31	97954
2004-06-30	27586
2004-09-30	56540
2004-12-31	-34039
2005-03-31	122054
2005-06-30	105301
2005-09-30	26103
2005-12-31	-1911
2006-03-31	106983
2006-06-30	18793
2006-09-30	50543
2006-12-31	-18626
2007-03-31	198861
2007-06-30	102157
2007-09-30	73389
2007-12-31	72385
2008-03-31	72696
2008-06-30	-188658
2008-09-30	43611
2008-12-31	-160597
2009-03-31	-28167
2009-06-30	13796
2009-09-30	-75890
2009-12-31	-83260
2010-03-31	87691
2010-06-30	136473
2010-09-30	-34432
2010-12-31	-160160
2011-03-31	4470
2011-06-30	-26926
2011-09-30	148767
2011-12-31	-38124
2012-03-31	128278
2012-06-30	32976
2012-09-30	-82610
2012-12-31	-87995
2013-03-31	-55610
2013-06-30	-114317
2013-09-30	-179959
2013-12-31	-91393
2014-03-31	39404
2014-06-30	-46047
2014-09-30	3977
2014-12-31	3801
2015-03-31	139064
2015-06-30	-74121
2015-09-30	-4502
2015-12-31	-16509
2016-03-31	4678
2016-06-30	50073
2016-09-30	4660
2016-12-31	14218
2017-03-31	51860
2017-06-30	-30529
2017-09-30	-46760
2017-12-31	46490
2018-03-31	32601
2018-06-30	15924
2018-09-30	-18844
2018-12-31	-51134
2019-03-31	44958
2019-06-30	16579
2019-09-30	27077
2019-12-31	-132453
2020-03-31	186348
2020-06-30	-47458
2020-09-30	828
2020-12-31	9349
2021-03-31	94620
2021-06-30	32113
2021-09-30	-96325
2021-12-31	33877
2022-03-31	114099
2022-06-30	68617
2022-09-30	-21423
2022-12-31	-48103
2023-03-31	-82086
2023-06-30	-22468
2023-09-30	-25207