Quarter	US dollars
1999-03-31	-27294
1999-06-30	-6544
1999-09-30	6450
1999-12-31	3500
2000-03-31	22051
2000-06-30	6952
2000-09-30	3979
2000-12-31	13988
2001-03-31	-18060
2001-06-30	10350
2001-09-30	-34612
2001-12-31	9744
2002-03-31	195
2002-06-30	-6785
2002-09-30	15872
2002-12-31	-2412
2003-03-31	-514
2003-06-30	-15532
2003-09-30	4309
2003-12-31	-17470
2004-03-31	-1135
2004-06-30	16248
2004-09-30	25306
2004-12-31	11051
2005-03-31	-11737
2005-06-30	17607
2005-09-30	-14463
2005-12-31	20454
2006-03-31	-14274
2006-06-30	-14577
2006-09-30	-3140
2006-12-31	22947
2007-03-31	13691
2007-06-30	15936
2007-09-30	37373
2007-12-31	35504
2008-03-31	62664
2008-06-30	-86516
2008-09-30	10687
2008-12-31	-105466
2009-03-31	-59754
2009-06-30	33493
2009-09-30	-18563
2009-12-31	-47968
2010-03-31	-9151
2010-06-30	-4192
2010-09-30	-18523
2010-12-31	-794
2011-03-31	5369
2011-06-30	-4532
2011-09-30	-535
2011-12-31	18641
2012-03-31	-2276
2012-06-30	-2705
2012-09-30	-4157
2012-12-31	6487
2013-03-31	15633
2013-06-30	-3733
2013-09-30	5109
2013-12-31	7639
2014-03-31	-18292
2014-06-30	3823
2014-09-30	4594
2014-12-31	19447
2015-03-31	-17731
2015-06-30	-15383
2015-09-30	-7587
2015-12-31	17756
2016-03-31	-7534
2016-06-30	-10829
2016-09-30	-2790
2016-12-31	10284
2017-03-31	-26200
2017-06-30	-839
2017-09-30	11518
2017-12-31	-15362
2018-03-31	12108
2018-06-30	12604
2018-09-30	19362
2018-12-31	-9340
2019-03-31	1237
2019-06-30	-12339
2019-09-30	354
2019-12-31	-3455
2020-03-31	33458
2020-06-30	-28894
2020-09-30	-16882
2020-12-31	-589
2021-03-31	22513
2021-06-30	-11598
2021-09-30	4874
2021-12-31	-18566
2022-03-31	61237
2022-06-30	47330
2022-09-30	-10924
2022-12-31	-708
2023-03-31	21034
2023-06-30	3120
2023-09-30	8368