Quarter	US dollars
1999-09-30	18
1999-12-31	34
2000-03-31	33
2000-06-30	45
2000-09-30	50
2000-12-31	60
2001-03-31	53
2001-06-30	83
2001-09-30	75
2001-12-31	92
2002-03-31	83
2002-06-30	82
2002-09-30	83
2002-12-31	90
2003-03-31	111
2003-06-30	183
2003-09-30	209
2003-12-31	236
2004-03-31	303
2004-06-30	328
2004-09-30	528
2004-12-31	524
2005-03-31	482
2005-06-30	213
2005-09-30	430
2005-12-31	434
2006-03-31	543
2006-06-30	714
2006-09-30	676
2006-12-31	949
2007-03-31	1573
2007-06-30	1461
2007-09-30	1715
2007-12-31	1688
2008-03-31	1775
2008-06-30	2283
2008-09-30	2196
2008-12-31	1771
2009-03-31	1748
2009-06-30	1583
2009-09-30	1479
2009-12-31	1300
2010-03-31	1947
2010-06-30	2852
2010-09-30	3108
2010-12-31	3674
2011-03-31	3998
2011-06-30	3576
2011-09-30	2373
2011-12-31	2117
2012-03-31	2881
2012-06-30	2764
2012-09-30	1717
2012-12-31	1743
2013-03-31	1861
2013-06-30	1887
2013-09-30	1913
2013-12-31	1851
2014-03-31	1887
2014-06-30	1857
2014-09-30	2090
2014-12-31	1157
2015-03-31	739
2015-06-30	558
2015-09-30	479
2015-12-31	464
2016-03-31	508
2016-06-30	416
2016-09-30	339
2016-12-31	321
2017-03-31	313
2017-06-30	308
2017-09-30	303
2017-12-31	240
2018-03-31	261
2018-06-30	219
2018-09-30	138
2018-12-31	167
2019-03-31	175
2019-06-30	271
2019-09-30	237
2019-12-31	304
2020-03-31	274
2020-06-30	252
2020-09-30	208
2020-12-31	167
2021-03-31	160
2021-06-30	333
2021-09-30	252
2021-12-31	220
2022-03-31	243
2022-06-30	117
2022-09-30	135
2022-12-31	75
2023-03-31	93
2023-06-30	104
2023-09-30	151