Quarter	US dollars
1999-09-30	522
1999-12-31	503
2000-03-31	507
2000-06-30	494
2000-09-30	297
2000-12-31	293
2001-03-31	247
2001-06-30	207
2001-09-30	260
2001-12-31	214
2002-03-31	275
2002-06-30	269
2002-09-30	277
2002-12-31	243
2003-03-31	256
2003-06-30	254
2003-09-30	236
2003-12-31	215
2004-03-31	239
2004-06-30	227
2004-09-30	290
2004-12-31	296
2005-03-31	236
2005-06-30	197
2005-09-30	196
2005-12-31	227
2006-03-31	420
2006-06-30	453
2006-09-30	413
2006-12-31	644
2007-03-31	551
2007-06-30	486
2007-09-30	371
2007-12-31	567
2008-03-31	362
2008-06-30	585
2008-09-30	501
2008-12-31	568
2009-03-31	476
2009-06-30	487
2009-09-30	429
2009-12-31	420
2010-03-31	394
2010-06-30	302
2010-09-30	216
2010-12-31	127
2011-03-31	143
2011-06-30	125
2011-09-30	120
2011-12-31	107
2012-03-31	104
2012-06-30	94
2012-09-30	90
2012-12-31	91
2013-03-31	76
2013-06-30	71
2013-09-30	68
2013-12-31	53
2014-03-31	42
2014-06-30	63
2014-09-30	97
2014-12-31	125
2015-03-31	132
2015-06-30	118
2015-09-30	112
2015-12-31	117
2016-03-31	86
2016-06-30	75
2016-09-30	78
2016-12-31	76
2017-03-31	76
2017-06-30	86
2017-09-30	78
2017-12-31	66
2018-03-31	44
2018-06-30	57
2018-09-30	64
2018-12-31	47
2019-03-31	8
2019-06-30	47
2019-09-30	49
2019-12-31	18
2020-03-31	16
2020-06-30	6
2020-09-30	3
2020-12-31	12
2021-03-31	22
2021-06-30	12
2021-09-30	3
2021-12-31	26
2022-03-31	33
2022-06-30	21
2022-09-30	25
2022-12-31	28
2023-03-31	21
2023-06-30	19
2023-09-30	34