Quarter	US dollars
1999-03-31	104204
1999-06-30	42382
1999-09-30	-66361
1999-12-31	-72288
2000-03-31	79822
2000-06-30	8547
2000-09-30	13422
2000-12-31	-40101
2001-03-31	108411
2001-06-30	-14471
2001-09-30	17318
2001-12-31	-16815
2002-03-31	-4058
2002-06-30	14159
2002-09-30	53795
2002-12-31	52708
2003-03-31	76121
2003-06-30	49692
2003-09-30	-40666
2003-12-31	-8069
2004-03-31	77091
2004-06-30	23311
2004-09-30	44378
2004-12-31	-29288
2005-03-31	152691
2005-06-30	62490
2005-09-30	3907
2005-12-31	-28605
2006-03-31	97916
2006-06-30	40271
2006-09-30	-7104
2006-12-31	-1338
2007-03-31	218237
2007-06-30	75025
2007-09-30	-9505
2007-12-31	16815
2008-03-31	20202
2008-06-30	-179422
2008-09-30	24528
2008-12-31	-48189
2009-03-31	-31323
2009-06-30	-94829
2009-09-30	-50745
2009-12-31	36299
2010-03-31	73332
2010-06-30	2265
2010-09-30	-15990
2010-12-31	-77273
2011-03-31	76402
2011-06-30	-15951
2011-09-30	132105
2011-12-31	-86011
2012-03-31	95865
2012-06-30	8839
2012-09-30	-59878
2012-12-31	-28464
2013-03-31	-19665
2013-06-30	-58901
2013-09-30	-120509
2013-12-31	-49715
2014-03-31	38898
2014-06-30	22404
2014-09-30	-6067
2014-12-31	-33294
2015-03-31	104784
2015-06-30	-97763
2015-09-30	-47894
2015-12-31	-23862
2016-03-31	-8932
2016-06-30	56552
2016-09-30	-23486
2016-12-31	14898
2017-03-31	14432
2017-06-30	-17809
2017-09-30	-61984
2017-12-31	2500
2018-03-31	15150
2018-06-30	23901
2018-09-30	-26978
2018-12-31	14402
2019-03-31	37083
2019-06-30	13644
2019-09-30	26438
2019-12-31	-107502
2020-03-31	122974
2020-06-30	-62405
2020-09-30	34061
2020-12-31	-4987
2021-03-31	31490
2021-06-30	19997
2021-09-30	-47317
2021-12-31	84087
2022-03-31	32222
2022-06-30	10655
2022-09-30	10647
2022-12-31	-102326
2023-03-31	-42969
2023-06-30	-6720
2023-09-30	2491