Quarter	US dollars
1999-09-30	-3691
1999-12-31	-290
2000-03-31	153
2000-06-30	182
2000-09-30	231
2000-12-31	42
2001-03-31	-309
2001-06-30	-2120
2001-09-30	-853
2001-12-31	-1557
2002-03-31	-959
2002-06-30	-910
2002-09-30	-1216
2002-12-31	-1167
2003-03-31	-689
2003-06-30	-902
2003-09-30	-286
2003-12-31	-1482
2004-03-31	-1139
2004-06-30	-3050
2004-09-30	-3824
2004-12-31	-2867
2005-03-31	-4945
2005-06-30	-4979
2005-09-30	-5229
2005-12-31	-5868
2006-03-31	-5569
2006-06-30	-5423
2006-09-30	-5290
2006-12-31	-7188
2007-03-31	-8232
2007-06-30	-19565
2007-09-30	-8904
2007-12-31	-7055
2008-03-31	-8814
2008-06-30	-2274
2008-09-30	-39728
2008-12-31	-33682
2009-03-31	-16837
2009-06-30	-4107
2009-09-30	-4365
2009-12-31	-2315
2010-03-31	-4227
2010-06-30	-1564
2010-09-30	-2368
2010-12-31	-2806
2011-03-31	-8053
2011-06-30	-8144
2011-09-30	-5712
2011-12-31	-5838
2012-03-31	-6390
2012-06-30	-3817
2012-09-30	-3937
2012-12-31	-2710
2013-03-31	-3824
2013-06-30	-3003
2013-09-30	-2580
2013-12-31	-3830
2014-03-31	-2983
2014-06-30	-2603
2014-09-30	-4414
2014-12-31	-4749
2015-03-31	-5534
2015-06-30	-6058
2015-09-30	-6791
2015-12-31	-7696
2016-03-31	-8234
2016-06-30	-6736
2016-09-30	-3103
2016-12-31	-1175
2017-03-31	-1650
2017-06-30	-2547
2017-09-30	-2587
2017-12-31	-2411
2018-03-31	-3343
2018-06-30	-2707
2018-09-30	-2912
2018-12-31	-2225
2019-03-31	-1934
2019-06-30	-726
2019-09-30	-327
2019-12-31	-911
2020-03-31	-1101
2020-06-30	-1131
2020-09-30	-1058
2020-12-31	-1789
2021-03-31	-844
2021-06-30	-871
2021-09-30	-1645
2021-12-31	-1761
2022-03-31	-2065
2022-06-30	-1464
2022-09-30	-1717
2022-12-31	-2404
2023-03-31	-869
2023-06-30	-329
2023-09-30	-115
2023-12-31	-868