Quarter	US dollars
1999-03-31	276
1999-06-30	273
1999-09-30	261
1999-12-31	53
2000-03-31	63
2000-06-30	39
2000-09-30	27
2000-12-31	28
2001-03-31	32
2001-06-30	74
2001-09-30	70
2001-12-31	102
2002-03-31	131
2002-06-30	142
2002-09-30	176
2002-12-31	163
2003-03-31	118
2003-06-30	151
2003-09-30	127
2003-12-31	184
2004-03-31	178
2004-06-30	262
2004-09-30	276
2004-12-31	245
2005-03-31	300
2005-06-30	334
2005-09-30	344
2005-12-31	287
2006-03-31	380
2006-06-30	602
2006-09-30	801
2006-12-31	941
2007-03-31	705
2007-06-30	1206
2007-09-30	1316
2007-12-31	1795
2008-03-31	2317
2008-06-30	3746
2008-09-30	5796
2008-12-31	3981
2009-03-31	1447
2009-06-30	1794
2009-09-30	1979
2009-12-31	2035
2010-03-31	1922
2010-06-30	1806
2010-09-30	1743
2010-12-31	1623
2011-03-31	1914
2011-06-30	1971
2011-09-30	1621
2011-12-31	1557
2012-03-31	1583
2012-06-30	1952
2012-09-30	1571
2012-12-31	2272
2013-03-31	2346
2013-06-30	2464
2013-09-30	3011
2013-12-31	2860
2014-03-31	3281
2014-06-30	4493
2014-09-30	5084
2014-12-31	5539
2015-03-31	6004
2015-06-30	5704
2015-09-30	5406
2015-12-31	4483
2016-03-31	4373
2016-06-30	3644
2016-09-30	2873
2016-12-31	3933
2017-03-31	4203
2017-06-30	4054
2017-09-30	4484
2017-12-31	4521
2018-03-31	8124
2018-06-30	8128
2018-09-30	9575
2018-12-31	9687
2019-03-31	10359
2019-06-30	10922
2019-09-30	10985
2019-12-31	11867
2020-03-31	12148
2020-06-30	11271
2020-09-30	11283
2020-12-31	13621
2021-03-31	13848
2021-06-30	13710
2021-09-30	13902
2021-12-31	13548
2022-03-31	13846
2022-06-30	14277
2022-09-30	15307
2022-12-31	14530
2023-03-31	15706
2023-06-30	15267
2023-09-30	15134