Quarter	US dollars
2004-12-31	125560
2005-03-31	115904
2005-06-30	94687
2005-09-30	98589
2005-12-31	101592
2006-03-31	119264
2006-06-30	107836
2006-09-30	117777
2006-12-31	131889
2007-03-31	152460
2007-06-30	152825
2007-09-30	189079
2007-12-31	164719
2008-03-31	158465
2008-06-30	88335
2008-09-30	115528
2008-12-31	58668
2009-03-31	44284
2009-06-30	44223
2009-09-30	31100
2009-12-31	-76892
2010-03-31	-64621
2010-06-30	-85104
2010-09-30	-95735
2010-12-31	-78305
2011-03-31	-77438
2011-06-30	-60684
2011-09-30	-72567
2011-12-31	-67000
2012-03-31	-65886
2012-06-30	-70874
2012-09-30	-54345
2012-12-31	8504
2013-03-31	8248
2013-06-30	595
2013-09-30	510
2013-12-31	7920
2014-03-31	11223
2014-06-30	16576
2014-09-30	11253
2014-12-31	10651
2015-03-31	7069
2015-06-30	15018
2015-09-30	22823
2015-12-31	17909
2016-03-31	18191
2016-06-30	20211
2016-09-30	19249
2016-12-31	21568
2017-03-31	31569
2017-06-30	18502
2017-09-30	16999
2017-12-31	22133
2018-03-31	23724
2018-06-30	12559
2018-09-30	16142
2018-12-31	9928
2019-03-31	-4456
2019-06-30	-18276
2019-09-30	-13801
2019-12-31	-6285
2020-03-31	-5831
2020-06-30	-11070
2020-09-30	8230
2020-12-31	10312
2021-03-31	7741
2021-06-30	-8347
2021-09-30	-10317
2021-12-31	-2806
2022-03-31	-3417
2022-06-30	-4349
2022-09-30	-7168
2022-12-31	-10784
2023-03-31	-16145
2023-06-30	-14353
2023-09-30	-20299