Quarterly 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