Quarter	US dollars
1999-03-31	123
1999-06-30	48
1999-09-30	48
1999-12-31	57
2000-03-31	65
2000-06-30	62
2000-09-30	60
2000-12-31	60
2001-03-31	59
2001-06-30	72
2001-09-30	73
2001-12-31	65
2002-03-31	57
2002-06-30	61
2002-09-30	61
2002-12-31	70
2003-03-31	67
2003-06-30	83
2003-09-30	72
2003-12-31	69
2004-03-31	51
2004-06-30	49
2004-09-30	49
2004-12-31	46
2005-03-31	47
2005-06-30	51
2005-09-30	50
2005-12-31	81
2006-03-31	97
2006-06-30	156
2006-09-30	155
2006-12-31	196
2007-03-31	191
2007-06-30	299
2007-09-30	286
2007-12-31	303
2008-03-31	344
2008-06-30	290
2008-09-30	240
2008-12-31	169
2009-03-31	246
2009-06-30	233
2009-09-30	240
2009-12-31	211
2010-03-31	189
2010-06-30	384
2010-09-30	179
2010-12-31	217
2011-03-31	152
2011-06-30	220
2011-09-30	221
2011-12-31	216
2012-03-31	322
2012-06-30	358
2012-09-30	351
2012-12-31	358
2013-03-31	355
2013-06-30	259
2013-09-30	393
2013-12-31	391
2014-03-31	284
2014-06-30	263
2014-09-30	293
2014-12-31	238
2015-03-31	268
2015-06-30	245
2015-09-30	257
2015-12-31	206
2016-03-31	201
2016-06-30	198
2016-09-30	359
2016-12-31	192
2017-03-31	411
2017-06-30	412
2017-09-30	380
2017-12-31	402
2018-03-31	378
2018-06-30	488
2018-09-30	485
2018-12-31	515
2019-03-31	543
2019-06-30	567
2019-09-30	626
2019-12-31	528
2020-03-31	447
2020-06-30	449
2020-09-30	495
2020-12-31	504
2021-03-31	505
2021-06-30	505
2021-09-30	513
2021-12-31	491
2022-03-31	516
2022-06-30	531
2022-09-30	837
2022-12-31	705
2023-03-31	568
2023-06-30	455
2023-09-30	321