Quarter	US dollars
2004-12-31	5447
2005-03-31	5528
2005-06-30	8206
2005-09-30	10266
2005-12-31	25694
2006-03-31	35092
2006-06-30	44021
2006-09-30	51058
2006-12-31	61730
2007-03-31	82226
2007-06-30	96582
2007-09-30	124340
2007-12-31	133335
2008-03-31	139000
2008-06-30	159837
2008-09-30	134272
2008-12-31	126481
2009-03-31	123225
2009-06-30	121855
2009-09-30	74390
2009-12-31	46572
2010-03-31	42354
2010-06-30	49170
2010-09-30	13927
2010-12-31	14021
2011-03-31	15357
2011-06-30	15115
2011-09-30	17773
2011-12-31	18929
2012-03-31	-6615
2012-06-30	-6138
2012-09-30	-6193
2012-12-31	-1541
2013-03-31	-1602
2013-06-30	-1815
2013-09-30	-1747
2013-12-31	-1980
2014-03-31	147
2014-06-30	539
2014-09-30	2779
2014-12-31	3435
2015-03-31	3695
2015-06-30	1433
2015-09-30	1437
2015-12-31	1722
2016-03-31	322
2016-06-30	876
2016-09-30	470
2016-12-31	890
2017-03-31	51
2017-06-30	270
2017-09-30	-79
2017-12-31	-185
2018-03-31	345
2018-06-30	462
2018-09-30	831
2018-12-31	298
2019-03-31	365
2019-06-30	440
2019-09-30	1749
2019-12-31	210
2020-03-31	2153
2020-06-30	63
2020-09-30	346
2020-12-31	-168
2021-03-31	47
2021-06-30	-486
2021-09-30	-329
2021-12-31	-588
2022-03-31	-371
2022-06-30	-588
2022-09-30	-634
2022-12-31	-141
2023-03-31	-459
2023-06-30	-9
2023-09-30	33