Quarter	US dollars
1999-03-31	194
1999-06-30	177
1999-09-30	266
1999-12-31	241
2000-03-31	200
2000-06-30	275
2000-09-30	187
2000-12-31	249
2001-03-31	197
2001-06-30	183
2001-09-30	231
2001-12-31	205
2002-03-31	218
2002-06-30	284
2002-09-30	204
2002-12-31	219
2003-03-31	226
2003-06-30	364
2003-09-30	483
2003-12-31	294
2004-03-31	234
2004-06-30	197
2004-09-30	301
2004-12-31	232
2005-03-31	243
2005-06-30	269
2005-09-30	306
2005-12-31	413
2006-03-31	328
2006-06-30	294
2006-09-30	337
2006-12-31	270
2007-03-31	324
2007-06-30	460
2007-09-30	421
2007-12-31	658
2008-03-31	704
2008-06-30	818
2008-09-30	841
2008-12-31	718
2009-03-31	777
2009-06-30	714
2009-09-30	678
2009-12-31	576
2010-03-31	543
2010-06-30	548
2010-09-30	678
2010-12-31	675
2011-03-31	679
2011-06-30	388
2011-09-30	529
2011-12-31	515
2012-03-31	410
2012-06-30	382
2012-09-30	387
2012-12-31	374
2013-03-31	426
2013-06-30	554
2013-09-30	516
2013-12-31	882
2014-03-31	1295
2014-06-30	1302
2014-09-30	1212
2014-12-31	1496
2015-03-31	1303
2015-06-30	1700
2015-09-30	37
2015-12-31	43
2016-03-31	46
2016-06-30	31
2016-09-30	30
2016-12-31	25
2017-03-31	28
2017-06-30	40
2017-09-30	58
2017-12-31	50
2018-03-31	48
2018-06-30	63
2018-09-30	70
2018-12-31	60
2019-03-31	140
2019-06-30	142
2019-09-30	148
2019-12-31	200
2020-03-31	239
2020-06-30	170
2020-09-30	191
2020-12-31	202
2021-03-31	272
2021-06-30	248
2021-09-30	181
2021-12-31	214
2022-03-31	242
2022-06-30	200
2022-09-30	194
2022-12-31	156
2023-03-31	115
2023-06-30	107
2023-09-30	103