Quarter	US dollars
1999-03-31	118
1999-06-30	259
1999-09-30	384
1999-12-31	241
2000-03-31	521
2000-06-30	194
2000-09-30	344
2000-12-31	150
2001-03-31	168
2001-06-30	208
2001-09-30	229
2001-12-31	405
2002-03-31	327
2002-06-30	241
2002-09-30	345
2002-12-31	145
2003-03-31	462
2003-06-30	187
2003-09-30	973
2003-12-31	726
2004-03-31	1646
2004-06-30	1964
2004-09-30	1386
2004-12-31	1948
2005-03-31	2324
2005-06-30	1090
2005-09-30	1654
2005-12-31	1110
2006-03-31	1737
2006-06-30	953
2006-09-30	1752
2006-12-31	1019
2007-03-31	2143
2007-06-30	2773
2007-09-30	2315
2007-12-31	1490
2008-03-31	607
2008-06-30	759
2008-09-30	1231
2008-12-31	222
2009-03-31	734
2009-06-30	912
2009-09-30	1297
2009-12-31	879
2010-03-31	812
2010-06-30	1133
2010-09-30	1296
2010-12-31	1040
2011-03-31	1081
2011-06-30	1109
2011-09-30	942
2011-12-31	712
2012-03-31	687
2012-06-30	663
2012-09-30	667
2012-12-31	568
2013-03-31	469
2013-06-30	328
2013-09-30	320
2013-12-31	285
2014-03-31	606
2014-06-30	275
2014-09-30	690
2014-12-31	412
2015-03-31	415
2015-06-30	391
2015-09-30	303
2015-12-31	433
2016-03-31	332
2016-06-30	129
2016-09-30	270
2016-12-31	202
2017-03-31	71
2017-06-30	87
2017-09-30	209
2017-12-31	80
2018-03-31	87
2018-06-30	100
2018-09-30	43
2018-12-31	24
2019-03-31	65
2019-06-30	74
2019-09-30	83
2019-12-31	45
2020-03-31	93
2020-06-30	68
2020-09-30	78
2020-12-31	82
2021-03-31	50
2021-06-30	42
2021-09-30	61
2021-12-31	60
2022-03-31	15
2022-06-30	32
2022-09-30	31
2022-12-31	18
2023-03-31	24
2023-06-30	27
2023-09-30	10