Quarter	US dollars
1986-09-30	12
1986-12-31	13
1987-03-31	12
1987-06-30	13
1987-09-30	13
1987-12-31	14
1988-03-31	15
1988-06-30	15
1988-09-30	17
1988-12-31	19
1989-03-31	15
1989-06-30	18
1989-09-30	17
1989-12-31	18
1990-03-31	18
1990-06-30	25
1990-09-30	22
1990-12-31	26
1991-03-31	40
1991-06-30	33
1991-09-30	32
1991-12-31	34
1992-03-31	53
1992-06-30	48
1992-09-30	54
1992-12-31	38
1993-03-31	56
1993-06-30	54
1993-09-30	50
1993-12-31	49
1994-03-31	48
1994-06-30	41
1994-09-30	51
1994-12-31	42
1995-03-31	50
1995-06-30	51
1995-09-30	49
1995-12-31	54
1996-03-31	90
1996-06-30	81
1996-09-30	94
1996-12-31	109
1997-03-31	110
1997-06-30	142
1997-09-30	142
1997-12-31	147
1998-03-31	133
1998-06-30	147
1998-09-30	61
1998-12-31	69
1999-03-31	142
1999-06-30	155
1999-09-30	168
1999-12-31	152
2000-03-31	193
2000-06-30	206
2000-09-30	221
2000-12-31	290
2001-03-31	306
2001-06-30	348
2001-09-30	320
2001-12-31	382
2002-03-31	338
2002-06-30	261
2002-09-30	228
2002-12-31	255
2003-03-31	198
2003-06-30	233
2003-09-30	208
2003-12-31	227
2004-03-31	185
2004-06-30	205
2004-09-30	157
2004-12-31	163
2005-03-31	260
2005-06-30	181
2005-09-30	219
2005-12-31	239
2006-03-31	257
2006-06-30	257
2006-09-30	375
2006-12-31	423
2007-03-31	416
2007-06-30	630
2007-09-30	637
2007-12-31	570
2008-03-31	411
2008-06-30	274
2008-09-30	427
2008-12-31	440
2009-03-31	449
2009-06-30	455
2009-09-30	447
2009-12-31	809
2010-03-31	578
2010-06-30	709
2010-09-30	640
2010-12-31	1018
2011-03-31	457
2011-06-30	435
2011-09-30	653
2011-12-31	378
2012-03-31	690
2012-06-30	502
2012-09-30	479
2012-12-31	744
2013-03-31	1688
2013-06-30	568
2013-09-30	475
2013-12-31	679
2014-03-31	748
2014-06-30	1340
2014-09-30	1191
2014-12-31	1313
2015-03-31	1367
2015-06-30	1377
2015-09-30	1331
2015-12-31	738
2016-03-31	1226
2016-06-30	1644
2016-09-30	994
2016-12-31	1084
2017-03-31	1403
2017-06-30	1158
2017-09-30	1718
2017-12-31	2239
2018-03-31	1003
2018-06-30	1745
2018-09-30	1883
2018-12-31	1637
2019-03-31	1341
2019-06-30	1093
2019-09-30	1525
2019-12-31	1444
2020-03-31	2187
2020-06-30	2106
2020-09-30	3296
2020-12-31	3054
2021-03-31	2848
2021-06-30	3263
2021-09-30	3658
2021-12-31	3281
2022-03-31	3762
2022-06-30	3072
2022-09-30	1207
2022-12-31	1169
2023-03-31	924
2023-06-30	1005
2023-09-30	747