Quarter	US dollars
1999-09-30	53
1999-12-31	23
2000-03-31	22
2000-06-30	59
2000-09-30	84
2000-12-31	123
2001-03-31	92
2001-06-30	83
2001-09-30	81
2001-12-31	63
2002-03-31	68
2002-06-30	67
2002-09-30	58
2002-12-31	55
2003-03-31	51
2003-06-30	31
2003-09-30	28
2003-12-31	29
2004-03-31	37
2004-06-30	33
2004-09-30	33
2004-12-31	94
2005-03-31	104
2005-06-30	108
2005-09-30	78
2005-12-31	79
2006-03-31	108
2006-06-30	113
2006-09-30	108
2006-12-31	104
2007-03-31	167
2007-06-30	167
2007-09-30	220
2007-12-31	456
2008-03-31	376
2008-06-30	492
2008-09-30	378
2008-12-31	289
2009-03-31	196
2009-06-30	153
2009-09-30	192
2009-12-31	200
2010-03-31	303
2010-06-30	254
2010-09-30	548
2010-12-31	409
2011-03-31	333
2011-06-30	302
2011-09-30	456
2011-12-31	385
2012-03-31	297
2012-06-30	344
2012-09-30	357
2012-12-31	344
2013-03-31	240
2013-06-30	255
2013-09-30	217
2013-12-31	185
2014-03-31	178
2014-06-30	183
2014-09-30	182
2014-12-31	187
2015-03-31	200
2015-06-30	168
2015-09-30	262
2015-12-31	253
2016-03-31	257
2016-06-30	234
2016-09-30	231
2016-12-31	186
2017-03-31	138
2017-06-30	145
2017-09-30	122
2017-12-31	122
2018-03-31	145
2018-06-30	128
2018-09-30	145
2018-12-31	119
2019-03-31	129
2019-06-30	192
2019-09-30	179
2019-12-31	168
2020-03-31	290
2020-06-30	326
2020-09-30	346
2020-12-31	531
2021-03-31	324
2021-06-30	307
2021-09-30	206
2021-12-31	183
2022-03-31	176
2022-06-30	311
2022-09-30	356
2022-12-31	164
2023-03-31	75
2023-06-30	115
2023-09-30	122