Quarter	US dollars
1999-09-30	110
1999-12-31	416
2000-03-31	166
2000-06-30	183
2000-09-30	386
2000-12-31	495
2001-03-31	533
2001-06-30	632
2001-09-30	1136
2001-12-31	3805
2002-03-31	282
2002-06-30	510
2002-09-30	870
2002-12-31	1999
2003-03-31	1177
2003-06-30	1277
2003-09-30	1813
2003-12-31	1932
2004-03-31	2466
2004-06-30	1808
2004-09-30	2408
2004-12-31	2158
2005-03-31	2898
2005-06-30	3336
2005-09-30	3219
2005-12-31	3030
2006-03-31	2829
2006-06-30	2828
2006-09-30	2722
2006-12-31	2752
2007-03-31	3197
2007-06-30	4316
2007-09-30	6473
2007-12-31	9080
2008-03-31	14620
2008-06-30	14900
2008-09-30	16686
2008-12-31	26850
2009-03-31	17144
2009-06-30	12157
2009-09-30	10029
2009-12-31	7039
2010-03-31	5917
2010-06-30	6710
2010-09-30	6340
2010-12-31	8937
2011-03-31	4339
2011-06-30	4354
2011-09-30	6118
2011-12-31	4377
2012-03-31	3787
2012-06-30	3661
2012-09-30	1681
2012-12-31	1753
2013-03-31	2024
2013-06-30	2851
2013-09-30	1336
2013-12-31	1810
2014-03-31	1459
2014-06-30	3690
2014-09-30	3298
2014-12-31	3988
2015-03-31	5945
2015-06-30	4744
2015-09-30	3799
2015-12-31	2724
2016-03-31	3648
2016-06-30	4570
2016-09-30	3899
2016-12-31	4552
2017-03-31	2773
2017-06-30	2964
2017-09-30	3506
2017-12-31	2330
2018-03-31	2990
2018-06-30	3871
2018-09-30	4567
2018-12-31	3845
2019-03-31	3611
2019-06-30	4357
2019-09-30	4461
2019-12-31	4239
2020-03-31	6120
2020-06-30	5789
2020-09-30	5422
2020-12-31	4840
2021-03-31	4767
2021-06-30	4982
2021-09-30	4726
2021-12-31	4584
2022-03-31	5986
2022-06-30	7573
2022-09-30	7706
2022-12-31	5413
2023-03-31	4112
2023-06-30	5280
2023-09-30	4148