Quarter	US dollars
2004-12-31	-1359
2005-03-31	-423
2005-06-30	1240
2005-09-30	2193
2005-12-31	1205
2006-03-31	4435
2006-06-30	13419
2006-09-30	11788
2006-12-31	13108
2007-03-31	16577
2007-06-30	25590
2007-09-30	26016
2007-12-31	37829
2008-03-31	27755
2008-06-30	28622
2008-09-30	21109
2008-12-31	31745
2009-03-31	14242
2009-06-30	3865
2009-09-30	4009
2009-12-31	1024
2010-03-31	4499
2010-06-30	9671
2010-09-30	-5817
2010-12-31	-7594
2011-03-31	-5211
2011-06-30	-4788
2011-09-30	-6806
2011-12-31	-5932
2012-03-31	-4515
2012-06-30	-4422
2012-09-30	-4654
2012-12-31	-4286
2013-03-31	-4486
2013-06-30	-3134
2013-09-30	400
2013-12-31	-3081
2014-03-31	1012
2014-06-30	393
2014-09-30	496
2014-12-31	1679
2015-03-31	431
2015-06-30	217
2015-09-30	1160
2015-12-31	-175
2016-03-31	332
2016-06-30	-2214
2016-09-30	-1412
2016-12-31	-4294
2017-03-31	-507
2017-06-30	-1046
2017-09-30	-2942
2017-12-31	3583
2018-03-31	1005
2018-06-30	-2718
2018-09-30	-3871
2018-12-31	-6078
2019-03-31	-4386
2019-06-30	-4781
2019-09-30	-5789
2019-12-31	-5699
2020-03-31	-8543
2020-06-30	-8645
2020-09-30	-8884
2020-12-31	-9378
2021-03-31	-6583
2021-06-30	-5856
2021-09-30	-4826
2021-12-31	-4270
2022-03-31	-3606
2022-06-30	-3339
2022-09-30	-4185
2022-12-31	-2722
2023-03-31	-1548
2023-06-30	-3596
2023-09-30	-3154