Quarter	US dollars
1999-03-31	119
1999-06-30	110
1999-09-30	144
1999-12-31	128
2000-03-31	168
2000-06-30	181
2000-09-30	191
2000-12-31	260
2001-03-31	281
2001-06-30	322
2001-09-30	293
2001-12-31	364
2002-03-31	319
2002-06-30	231
2002-09-30	199
2002-12-31	225
2003-03-31	166
2003-06-30	203
2003-09-30	179
2003-12-31	197
2004-03-31	154
2004-06-30	173
2004-09-30	122
2004-12-31	127
2005-03-31	226
2005-06-30	146
2005-09-30	189
2005-12-31	206
2006-03-31	219
2006-06-30	224
2006-09-30	339
2006-12-31	389
2007-03-31	373
2007-06-30	580
2007-09-30	595
2007-12-31	526
2008-03-31	322
2008-06-30	243
2008-09-30	395
2008-12-31	416
2009-03-31	426
2009-06-30	436
2009-09-30	428
2009-12-31	787
2010-03-31	557
2010-06-30	685
2010-09-30	607
2010-12-31	992
2011-03-31	431
2011-06-30	376
2011-09-30	607
2011-12-31	339
2012-03-31	661
2012-06-30	474
2012-09-30	446
2012-12-31	714
2013-03-31	1650
2013-06-30	535
2013-09-30	442
2013-12-31	645
2014-03-31	726
2014-06-30	1302
2014-09-30	1153
2014-12-31	1274
2015-03-31	1329
2015-06-30	1334
2015-09-30	1292
2015-12-31	698
2016-03-31	1186
2016-06-30	1597
2016-09-30	959
2016-12-31	1058
2017-03-31	1374
2017-06-30	1130
2017-09-30	1677
2017-12-31	2199
2018-03-31	964
2018-06-30	1712
2018-09-30	1847
2018-12-31	1606
2019-03-31	1258
2019-06-30	1014
2019-09-30	1478
2019-12-31	1398
2020-03-31	2144
2020-06-30	2069
2020-09-30	3261
2020-12-31	3016
2021-03-31	2807
2021-06-30	3223
2021-09-30	3625
2021-12-31	3244
2022-03-31	3726
2022-06-30	3004
2022-09-30	1142
2022-12-31	1100
2023-03-31	854
2023-06-30	940
2023-09-30	686