Quarter	US dollars
1986-09-30	95
1986-12-31	98
1987-03-31	97
1987-06-30	93
1987-09-30	94
1987-12-31	104
1988-03-31	97
1988-06-30	98
1988-09-30	98
1988-12-31	98
1989-03-31	87
1989-06-30	87
1989-09-30	86
1989-12-31	81
1990-03-31	80
1990-06-30	77
1990-09-30	80
1990-12-31	82
1991-03-31	71
1991-06-30	68
1991-09-30	65
1991-12-31	66
1992-03-31	64
1992-06-30	60
1992-09-30	61
1992-12-31	58
1993-03-31	56
1993-06-30	49
1993-09-30	50
1993-12-31	48
1994-03-31	37
1994-06-30	40
1994-09-30	40
1994-12-31	41
1995-03-31	44
1995-06-30	55
1995-09-30	65
1995-12-31	62
1996-03-31	60
1996-06-30	63
1996-09-30	75
1996-12-31	72
1997-03-31	58
1997-06-30	57
1997-09-30	54
1997-12-31	55
1998-03-31	58
1998-06-30	68
1998-09-30	66
1998-12-31	66
1999-03-31	57
1999-06-30	51
1999-09-30	49
1999-12-31	51
2000-03-31	45
2000-06-30	45
2000-09-30	44
2000-12-31	43
2001-03-31	41
2001-06-30	39
2001-09-30	38
2001-12-31	38
2002-03-31	40
2002-06-30	37
2002-09-30	37
2002-12-31	34
2003-03-31	36
2003-06-30	38
2003-09-30	38
2003-12-31	27
2004-03-31	40
2004-06-30	36
2004-09-30	33
2004-12-31	38
2005-03-31	31
2005-06-30	41
2005-09-30	32
2005-12-31	38
2006-03-31	27
2006-06-30	24
2006-09-30	25
2006-12-31	26
2007-03-31	27
2007-06-30	11
2007-09-30	12
2007-12-31	12
2008-03-31	13
2008-06-30	12
2008-09-30	11
2008-12-31	17
2009-03-31	17
2009-06-30	17
2009-09-30	18
2009-12-31	0
2010-03-31	0
2010-06-30	2
2010-09-30	3
2010-12-31	3
2011-03-31	-1
2011-06-30	0
2011-09-30	1
2011-12-31	6
2012-03-31	7
2012-06-30	3
2012-09-30	2
2012-12-31	2
2013-03-31	4
2013-06-30	1
2013-09-30	3
2013-12-31	3
2014-03-31	11
2014-06-30	8
2014-09-30	9
2014-12-31	7
2015-03-31	-6
2015-06-30	3
2015-09-30	9
2015-12-31	4
2016-03-31	2
2016-06-30	-6
2016-09-30	-17
2016-12-31	-4
2017-03-31	-10
2017-06-30	7
2017-09-30	13
2017-12-31	5
2018-03-31	2
2018-06-30	19
2018-09-30	21
2018-12-31	28
2019-03-31	-32
2019-06-30	-13
2019-09-30	12
2019-12-31	6
2020-03-31	-3
2020-06-30	28
2020-09-30	32
2020-12-31	26
2021-03-31	7
2021-06-30	12
2021-09-30	14
2021-12-31	-7
2022-03-31	8
2022-06-30	3
2022-09-30	10
2022-12-31	12
2023-03-31	-12
2023-06-30	24
2023-09-30	18