Quarter	US dollars
1999-09-30	2
1999-12-31	3
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	0
2001-03-31	6
2001-06-30	7
2001-09-30	9
2001-12-31	9
2002-03-31	4
2002-06-30	6
2002-09-30	2
2002-12-31	2
2003-03-31	2
2003-06-30	3
2003-09-30	2
2003-12-31	13
2004-03-31	4
2004-06-30	9
2004-09-30	31
2004-12-31	12
2005-03-31	34
2005-06-30	66
2005-09-30	51
2005-12-31	34
2006-03-31	23
2006-06-30	48
2006-09-30	108
2006-12-31	20
2007-03-31	53
2007-06-30	48
2007-09-30	69
2007-12-31	135
2008-03-31	280
2008-06-30	221
2008-09-30	182
2008-12-31	352
2009-03-31	341
2009-06-30	227
2009-09-30	246
2009-12-31	494
2010-03-31	440
2010-06-30	305
2010-09-30	440
2010-12-31	214
2011-03-31	208
2011-06-30	148
2011-09-30	349
2011-12-31	345
2012-03-31	315
2012-06-30	386
2012-09-30	384
2012-12-31	348
2013-03-31	295
2013-06-30	208
2013-09-30	201
2013-12-31	180
2014-03-31	182
2014-06-30	188
2014-09-30	196
2014-12-31	222
2015-03-31	254
2015-06-30	192
2015-09-30	223
2015-12-31	196
2016-03-31	221
2016-06-30	242
2016-09-30	208
2016-12-31	141
2017-03-31	124
2017-06-30	153
2017-09-30	121
2017-12-31	99
2018-03-31	66
2018-06-30	58
2018-09-30	39
2018-12-31	66
2019-03-31	83
2019-06-30	115
2019-09-30	128
2019-12-31	104
2020-03-31	196
2020-06-30	201
2020-09-30	187
2020-12-31	168
2021-03-31	127
2021-06-30	134
2021-09-30	125
2021-12-31	93
2022-03-31	47
2022-06-30	21
2022-09-30	19
2022-12-31	13
2023-03-31	11
2023-06-30	5
2023-09-30	20