Quarter	US dollars
1999-09-30	145
1999-12-31	148
2000-03-31	142
2000-06-30	123
2000-09-30	137
2000-12-31	147
2001-03-31	84
2001-06-30	153
2001-09-30	198
2001-12-31	274
2002-03-31	394
2002-06-30	293
2002-09-30	234
2002-12-31	240
2003-03-31	270
2003-06-30	282
2003-09-30	307
2003-12-31	362
2004-03-31	349
2004-06-30	446
2004-09-30	698
2004-12-31	649
2005-03-31	749
2005-06-30	955
2005-09-30	686
2005-12-31	1817
2006-03-31	2153
2006-06-30	2116
2006-09-30	2382
2006-12-31	2667
2007-03-31	3211
2007-06-30	3567
2007-09-30	4203
2007-12-31	4772
2008-03-31	5144
2008-06-30	5602
2008-09-30	5918
2008-12-31	5308
2009-03-31	5705
2009-06-30	5695
2009-09-30	5658
2009-12-31	5758
2010-03-31	5815
2010-06-30	6425
2010-09-30	5911
2010-12-31	6044
2011-03-31	5720
2011-06-30	5722
2011-09-30	4702
2011-12-31	5213
2012-03-31	4911
2012-06-30	4960
2012-09-30	4780
2012-12-31	4957
2013-03-31	5029
2013-06-30	4533
2013-09-30	4894
2013-12-31	4438
2014-03-31	4725
2014-06-30	4208
2014-09-30	4160
2014-12-31	3930
2015-03-31	3874
2015-06-30	3298
2015-09-30	76
2015-12-31	76
2016-03-31	79
2016-06-30	68
2016-09-30	68
2016-12-31	65
2017-03-31	71
2017-06-30	74
2017-09-30	64
2017-12-31	51
2018-03-31	53
2018-06-30	59
2018-09-30	53
2018-12-31	57
2019-03-31	66
2019-06-30	37
2019-09-30	34
2019-12-31	41
2020-03-31	33
2020-06-30	28
2020-09-30	30
2020-12-31	18
2021-03-31	21
2021-06-30	17
2021-09-30	39
2021-12-31	36
2022-03-31	34
2022-06-30	32
2022-09-30	29
2022-12-31	31
2023-03-31	31
2023-06-30	12
2023-09-30	12