Quarter	US dollars
1999-03-31	149
1999-06-30	152
1999-09-30	166
1999-12-31	129
2000-03-31	231
2000-06-30	145
2000-09-30	163
2000-12-31	115
2001-03-31	139
2001-06-30	131
2001-09-30	90
2001-12-31	92
2002-03-31	81
2002-06-30	100
2002-09-30	71
2002-12-31	219
2003-03-31	56
2003-06-30	69
2003-09-30	63
2003-12-31	52
2004-03-31	54
2004-06-30	127
2004-09-30	127
2004-12-31	31
2005-03-31	47
2005-06-30	47
2005-09-30	63
2005-12-31	64
2006-03-31	69
2006-06-30	88
2006-09-30	109
2006-12-31	61
2007-03-31	106
2007-06-30	169
2007-09-30	219
2007-12-31	264
2008-03-31	314
2008-06-30	397
2008-09-30	409
2008-12-31	346
2009-03-31	379
2009-06-30	352
2009-09-30	319
2009-12-31	309
2010-03-31	331
2010-06-30	245
2010-09-30	293
2010-12-31	305
2011-03-31	333
2011-06-30	349
2011-09-30	303
2011-12-31	617
2012-03-31	461
2012-06-30	488
2012-09-30	527
2012-12-31	443
2013-03-31	424
2013-06-30	307
2013-09-30	101
2013-12-31	134
2014-03-31	126
2014-06-30	129
2014-09-30	181
2014-12-31	179
2015-03-31	181
2015-06-30	177
2015-09-30	165
2015-12-31	158
2016-03-31	197
2016-06-30	164
2016-09-30	170
2016-12-31	221
2017-03-31	222
2017-06-30	199
2017-09-30	224
2017-12-31	179
2018-03-31	273
2018-06-30	308
2018-09-30	137
2018-12-31	390
2019-03-31	480
2019-06-30	645
2019-09-30	790
2019-12-31	798
2020-03-31	920
2020-06-30	924
2020-09-30	718
2020-12-31	904
2021-03-31	734
2021-06-30	1099
2021-09-30	1412
2021-12-31	1312
2022-03-31	1265
2022-06-30	1411
2022-09-30	1387
2022-12-31	1421
2023-03-31	1424
2023-06-30	1245
2023-09-30	1257