Quarter	US dollars
1999-09-30	68
1999-12-31	40
2000-03-31	77
2000-06-30	71
2000-09-30	80
2000-12-31	266
2001-03-31	345
2001-06-30	193
2001-09-30	172
2001-12-31	255
2002-03-31	201
2002-06-30	1454
2002-09-30	258
2002-12-31	299
2003-03-31	479
2003-06-30	388
2003-09-30	581
2003-12-31	505
2004-03-31	697
2004-06-30	368
2004-09-30	530
2004-12-31	1766
2005-03-31	1607
2005-06-30	1733
2005-09-30	1703
2005-12-31	1334
2006-03-31	1620
2006-06-30	3140
2006-09-30	2985
2006-12-31	877
2007-03-31	3120
2007-06-30	3573
2007-09-30	4293
2007-12-31	5792
2008-03-31	12575
2008-06-30	15857
2008-09-30	20947
2008-12-31	22618
2009-03-31	22326
2009-06-30	16702
2009-09-30	13089
2009-12-31	11610
2010-03-31	9314
2010-06-30	13490
2010-09-30	11177
2010-12-31	10863
2011-03-31	7775
2011-06-30	17162
2011-09-30	11446
2011-12-31	9139
2012-03-31	7241
2012-06-30	7914
2012-09-30	7608
2012-12-31	7491
2013-03-31	7349
2013-06-30	7831
2013-09-30	7158
2013-12-31	7773
2014-03-31	2656
2014-06-30	6671
2014-09-30	6869
2014-12-31	7603
2015-03-31	6733
2015-06-30	6377
2015-09-30	9803
2015-12-31	6494
2016-03-31	5418
2016-06-30	4687
2016-09-30	3311
2016-12-31	5288
2017-03-31	2222
2017-06-30	2147
2017-09-30	2043
2017-12-31	1859
2018-03-31	1649
2018-06-30	3627
2018-09-30	2370
2018-12-31	2238
2019-03-31	2615
2019-06-30	2777
2019-09-30	3830
2019-12-31	2046
2020-03-31	4837
2020-06-30	2583
2020-09-30	1897
2020-12-31	2481
2021-03-31	2025
2021-06-30	1875
2021-09-30	3877
2021-12-31	2703
2022-03-31	3712
2022-06-30	7608
2022-09-30	14239
2022-12-31	6441
2023-03-31	4883
2023-06-30	4896
2023-09-30	6364