Quarter	US dollars
2004-12-31	3690
2005-03-31	3219
2005-06-30	2633
2005-09-30	2278
2005-12-31	2110
2006-03-31	3585
2006-06-30	2285
2006-09-30	1915
2006-12-31	5209
2007-03-31	2554
2007-06-30	1709
2007-09-30	1795
2007-12-31	-486
2008-03-31	-5847
2008-06-30	-5063
2008-09-30	-5574
2008-12-31	-1482
2009-03-31	-985
2009-06-30	-1018
2009-09-30	-1062
2009-12-31	-20719
2010-03-31	-20296
2010-06-30	-16886
2010-09-30	-19606
2010-12-31	-17156
2011-03-31	-17503
2011-06-30	-16533
2011-09-30	-13724
2011-12-31	-13890
2012-03-31	-13784
2012-06-30	-12083
2012-09-30	-11839
2012-12-31	-643
2013-03-31	-376
2013-06-30	-296
2013-09-30	274
2013-12-31	825
2014-03-31	-260
2014-06-30	-212
2014-09-30	-410
2014-12-31	-537
2015-03-31	-1096
2015-06-30	-1148
2015-09-30	-1224
2015-12-31	-975
2016-03-31	-659
2016-06-30	-1201
2016-09-30	-168
2016-12-31	1063
2017-03-31	797
2017-06-30	-335
2017-09-30	-443
2017-12-31	-478
2018-03-31	1365
2018-06-30	650
2018-09-30	331
2018-12-31	-2905
2019-03-31	-2404
2019-06-30	-3071
2019-09-30	-2747
2019-12-31	-1152
2020-03-31	-139
2020-06-30	93
2020-09-30	-491
2020-12-31	-981
2021-03-31	-697
2021-06-30	-797
2021-09-30	-913
2021-12-31	-749
2022-03-31	103
2022-06-30	-424
2022-09-30	-420
2022-12-31	-697
2023-03-31	-588
2023-06-30	-651
2023-09-30	-879