Quarter	US dollars
1986-09-30	17
1986-12-31	25
1987-03-31	23
1987-06-30	17
1987-09-30	81
1987-12-31	23
1988-03-31	26
1988-06-30	35
1988-09-30	35
1988-12-31	31
1989-03-31	28
1989-06-30	33
1989-09-30	37
1989-12-31	30
1990-03-31	44
1990-06-30	40
1990-09-30	35
1990-12-31	41
1991-03-31	52
1991-06-30	79
1991-09-30	76
1991-12-31	39
1992-03-31	36
1992-06-30	46
1992-09-30	37
1992-12-31	34
1993-03-31	28
1993-06-30	26
1993-09-30	22
1993-12-31	29
1994-03-31	30
1994-06-30	30
1994-09-30	33
1994-12-31	34
1995-03-31	20
1995-06-30	19
1995-09-30	18
1995-12-31	60
1996-03-31	34
1996-06-30	22
1996-09-30	34
1996-12-31	239
1997-03-31	256
1997-06-30	459
1997-09-30	405
1997-12-31	204
1998-03-31	187
1998-06-30	90
1998-09-30	81
1998-12-31	66
1999-03-31	71
1999-06-30	57
1999-09-30	39
1999-12-31	25
2000-03-31	27
2000-06-30	26
2000-09-30	29
2000-12-31	54
2001-03-31	59
2001-06-30	56
2001-09-30	45
2001-12-31	23
2002-03-31	64
2002-06-30	48
2002-09-30	112
2002-12-31	96
2003-03-31	112
2003-06-30	149
2003-09-30	132
2003-12-31	148
2004-03-31	322
2004-06-30	221
2004-09-30	149
2004-12-31	248
2005-03-31	277
2005-06-30	377
2005-09-30	305
2005-12-31	224
2006-03-31	669
2006-06-30	79
2006-09-30	79
2006-12-31	85
2007-03-31	57
2007-06-30	55
2007-09-30	81
2007-12-31	74
2008-03-31	59
2008-06-30	72
2008-09-30	91
2008-12-31	48
2009-03-31	49
2009-06-30	39
2009-09-30	111
2009-12-31	145
2010-03-31	147
2010-06-30	92
2010-09-30	137
2010-12-31	74
2011-03-31	131
2011-06-30	134
2011-09-30	134
2011-12-31	136
2012-03-31	221
2012-06-30	245
2012-09-30	173
2012-12-31	132
2013-03-31	40
2013-06-30	45
2013-09-30	61
2013-12-31	115
2014-03-31	42
2014-06-30	48
2014-09-30	50
2014-12-31	54
2015-03-31	47
2015-06-30	52
2015-09-30	48
2015-12-31	210
2016-03-31	210
2016-06-30	173
2016-09-30	218
2016-12-31	215
2017-03-31	217
2017-06-30	217
2017-09-30	257
2017-12-31	436
2018-03-31	436
2018-06-30	438
2018-09-30	440
2018-12-31	221
2019-03-31	222
2019-06-30	222
2019-09-30	122
2019-12-31	169
2020-03-31	575
2020-06-30	151
2020-09-30	52
2020-12-31	123
2021-03-31	28
2021-06-30	20
2021-09-30	18
2021-12-31	22
2022-03-31	22
2022-06-30	25
2022-09-30	15
2022-12-31	17
2023-03-31	16
2023-06-30	20
2023-09-30	18