Quarter	US dollars
2004-12-31	18738
2005-03-31	23178
2005-06-30	31134
2005-09-30	37322
2005-12-31	49781
2006-03-31	62432
2006-06-30	80458
2006-09-30	89363
2006-12-31	108203
2007-03-31	138419
2007-06-30	154260
2007-09-30	195812
2007-12-31	230867
2008-03-31	303845
2008-06-30	296009
2008-09-30	238269
2008-12-31	213879
2009-03-31	190578
2009-06-30	184461
2009-09-30	133366
2009-12-31	95819
2010-03-31	85780
2010-06-30	79327
2010-09-30	53599
2010-12-31	46859
2011-03-31	50387
2011-06-30	49961
2011-09-30	57499
2011-12-31	58127
2012-03-31	-4064
2012-06-30	-3275
2012-09-30	-4426
2012-12-31	341
2013-03-31	739
2013-06-30	-319
2013-09-30	287
2013-12-31	76
2014-03-31	1979
2014-06-30	2623
2014-09-30	3795
2014-12-31	5324
2015-03-31	5516
2015-06-30	3770
2015-09-30	3900
2015-12-31	4471
2016-03-31	3354
2016-06-30	3477
2016-09-30	2805
2016-12-31	3903
2017-03-31	2832
2017-06-30	3116
2017-09-30	2989
2017-12-31	2193
2018-03-31	1276
2018-06-30	1492
2018-09-30	2316
2018-12-31	1512
2019-03-31	1786
2019-06-30	1524
2019-09-30	2416
2019-12-31	1443
2020-03-31	2897
2020-06-30	1562
2020-09-30	1374
2020-12-31	704
2021-03-31	702
2021-06-30	544
2021-09-30	1292
2021-12-31	303
2022-03-31	426
2022-06-30	396
2022-09-30	-251
2022-12-31	37
2023-03-31	-166
2023-06-30	673
2023-09-30	974