Quarter	US dollars
1999-09-30	16
1999-12-31	19
2000-03-31	2
2000-06-30	0
2000-09-30	1
2000-12-31	0
2001-03-31	0
2001-06-30	1
2001-09-30	3
2001-12-31	10
2002-03-31	4
2002-06-30	34
2002-09-30	25
2002-12-31	42
2003-03-31	35
2003-06-30	50
2003-09-30	42
2003-12-31	30
2004-03-31	31
2004-06-30	25
2004-09-30	22
2004-12-31	25
2005-03-31	40
2005-06-30	27
2005-09-30	41
2005-12-31	51
2006-03-31	95
2006-06-30	211
2006-09-30	133
2006-12-31	137
2007-03-31	137
2007-06-30	217
2007-09-30	212
2007-12-31	255
2008-03-31	437
2008-06-30	448
2008-09-30	356
2008-12-31	602
2009-03-31	579
2009-06-30	375
2009-09-30	441
2009-12-31	451
2010-03-31	558
2010-06-30	979
2010-09-30	972
2010-12-31	858
2011-03-31	660
2011-06-30	822
2011-09-30	776
2011-12-31	628
2012-03-31	644
2012-06-30	568
2012-09-30	486
2012-12-31	479
2013-03-31	465
2013-06-30	473
2013-09-30	489
2013-12-31	557
2014-03-31	472
2014-06-30	472
2014-09-30	538
2014-12-31	490
2015-03-31	534
2015-06-30	352
2015-09-30	373
2015-12-31	295
2016-03-31	345
2016-06-30	415
2016-09-30	416
2016-12-31	240
2017-03-31	213
2017-06-30	200
2017-09-30	208
2017-12-31	196
2018-03-31	243
2018-06-30	189
2018-09-30	185
2018-12-31	218
2019-03-31	189
2019-06-30	195
2019-09-30	227
2019-12-31	172
2020-03-31	254
2020-06-30	220
2020-09-30	255
2020-12-31	180
2021-03-31	163
2021-06-30	51
2021-09-30	54
2021-12-31	49
2022-03-31	51
2022-06-30	63
2022-09-30	132
2022-12-31	94
2023-03-31	86
2023-06-30	85
2023-09-30	44