Quarter	US dollars
1999-09-30	77
1999-12-31	98
2000-03-31	94
2000-06-30	129
2000-09-30	158
2000-12-31	112
2001-03-31	186
2001-06-30	198
2001-09-30	196
2001-12-31	278
2002-03-31	325
2002-06-30	356
2002-09-30	343
2002-12-31	394
2003-03-31	406
2003-06-30	460
2003-09-30	552
2003-12-31	514
2004-03-31	476
2004-06-30	377
2004-09-30	447
2004-12-31	530
2005-03-31	480
2005-06-30	482
2005-09-30	448
2005-12-31	376
2006-03-31	404
2006-06-30	516
2006-09-30	443
2006-12-31	421
2007-03-31	441
2007-06-30	660
2007-09-30	756
2007-12-31	1023
2008-03-31	1866
2008-06-30	2311
2008-09-30	2548
2008-12-31	3184
2009-03-31	2731
2009-06-30	1884
2009-09-30	1628
2009-12-31	1353
2010-03-31	1097
2010-06-30	2068
2010-09-30	2269
2010-12-31	2261
2011-03-31	4339
2011-06-30	4011
2011-09-30	5381
2011-12-31	3061
2012-03-31	2659
2012-06-30	3324
2012-09-30	3548
2012-12-31	2829
2013-03-31	2723
2013-06-30	3114
2013-09-30	4155
2013-12-31	5158
2014-03-31	7209
2014-06-30	2373
2014-09-30	2523
2014-12-31	2580
2015-03-31	3859
2015-06-30	3489
2015-09-30	3425
2015-12-31	3453
2016-03-31	5042
2016-06-30	6944
2016-09-30	4500
2016-12-31	3465
2017-03-31	3136
2017-06-30	2953
2017-09-30	3612
2017-12-31	3513
2018-03-31	4380
2018-06-30	3170
2018-09-30	3725
2018-12-31	3490
2019-03-31	2605
2019-06-30	2841
2019-09-30	4616
2019-12-31	2775
2020-03-31	5772
2020-06-30	3498
2020-09-30	4638
2020-12-31	7066
2021-03-31	5354
2021-06-30	5615
2021-09-30	3823
2021-12-31	4709
2022-03-31	4648
2022-06-30	5400
2022-09-30	6910
2022-12-31	4540
2023-03-31	3087
2023-06-30	4937
2023-09-30	4921