Quarterly US dollars
1986-09-30 65
1986-12-31 54
1987-03-31 46
1987-06-30 46
1987-09-30 42
1987-12-31 38
1988-03-31 42
1988-06-30 40
1988-09-30 40
1988-12-31 37
1989-03-31 36
1989-06-30 35
1989-09-30 39
1989-12-31 31
1990-03-31 27
1990-06-30 35
1990-09-30 39
1990-12-31 35
1991-03-31 30
1991-06-30 31
1991-09-30 45
1991-12-31 35
1992-03-31 32
1992-06-30 57
1992-09-30 47
1992-12-31 44
1993-03-31 38
1993-06-30 26
1993-09-30 17
1993-12-31 17
1994-03-31 15
1994-06-30 16
1994-09-30 15
1994-12-31 13
1995-03-31 10
1995-06-30 9
1995-09-30 9
1995-12-31 8
1996-03-31 9
1996-06-30 9
1996-09-30 12
1996-12-31 16
1997-03-31 14
1997-06-30 26
1997-09-30 29
1997-12-31 21
1998-03-31 40
1998-06-30 50
1998-09-30 58
1998-12-31 56
1999-03-31 25
1999-06-30 34
1999-09-30 29
1999-12-31 28
2000-03-31 31
2000-06-30 36
2000-09-30 21
2000-12-31 38
2001-03-31 27
2001-06-30 7
2001-09-30 9
2001-12-31 8
2002-03-31 8
2002-06-30 9
2002-09-30 9
2002-12-31 29
2003-03-31 28
2003-06-30 9
2003-09-30 8
2003-12-31 12
2004-03-31 8
2004-06-30 7
2004-09-30 8
2004-12-31 7
2005-03-31 7
2005-06-30 8
2005-09-30 7
2005-12-31 7
2006-03-31 8
2006-06-30 7
2006-09-30 43
2006-12-31 55
2007-03-31 29
2007-06-30 44
2007-09-30 69
2007-12-31 45
2008-03-31 33
2008-06-30 63
2008-09-30 54
2008-12-31 48
2009-03-31 8
2009-06-30 15
2009-09-30 33
2009-12-31 31
2010-03-31 9
2010-06-30 29
2010-09-30 26
2010-12-31 21
2011-03-31 14
2011-06-30 13
2011-09-30 25
2011-12-31 26
2012-03-31 12
2012-06-30 10
2012-09-30 11
2012-12-31 33
2013-03-31 12
2013-06-30 9
2013-09-30 24
2013-12-31 28
2014-03-31 21
2014-06-30 11
2014-09-30 12
2014-12-31 12
2015-03-31 12
2015-06-30 14
2015-09-30 12
2015-12-31 10
2016-03-31 10
2016-06-30 9
2016-09-30 9
2016-12-31 9
2017-03-31 8
2017-06-30 13
2017-09-30 20
2017-12-31 21
2018-03-31 202
2018-06-30 198
2018-09-30 183
2018-12-31 190
2019-03-31 179
2019-06-30 184
2019-09-30 189
2019-12-31 185
2020-03-31 255
2020-06-30 309
2020-09-30 240
2020-12-31 245
2021-03-31 241
2021-06-30 134
2021-09-30 129
2021-12-31 135
2022-03-31 117
2022-06-30 91
2022-09-30 103
2022-12-31 61
2023-03-31 45
2023-06-30 15
2023-09-30 18