Quarterly US dollars
1986-09-30 6
1986-12-31 14
1987-03-31 7
1987-06-30 9
1987-09-30 18
1987-12-31 11
1988-03-31 48
1988-06-30 9
1988-09-30 7
1988-12-31 4
1989-03-31 4
1989-06-30 17
1989-09-30 6
1989-12-31 10
1990-03-31 14
1990-06-30 8
1990-09-30 21
1990-12-31 24
1991-03-31 18
1991-06-30 84
1991-09-30 24
1991-12-31 38
1992-03-31 32
1992-06-30 32
1992-09-30 132
1992-12-31 110
1993-03-31 38
1993-06-30 34
1993-09-30 31
1993-12-31 25
1994-03-31 23
1994-06-30 140
1994-09-30 159
1994-12-31 57
1995-03-31 18
1995-06-30 241
1995-09-30 18
1995-12-31 20
1996-03-31 171
1996-06-30 136
1996-09-30 21
1996-12-31 28
1997-03-31 46
1997-06-30 19
1997-09-30 1051
1997-12-31 1053
1998-03-31 1228
1998-06-30 1186
1998-09-30 334
1998-12-31 308
1999-03-31 309
1999-06-30 364
1999-09-30 380
1999-12-31 451
2000-03-31 392
2000-06-30 352
2000-09-30 327
2000-12-31 330
2001-03-31 287
2001-06-30 287
2001-09-30 263
2001-12-31 263
2002-03-31 227
2002-06-30 304
2002-09-30 238
2002-12-31 224
2003-03-31 190
2003-06-30 198
2003-09-30 164
2003-12-31 182
2004-03-31 142
2004-06-30 142
2004-09-30 103
2004-12-31 107
2005-03-31 66
2005-06-30 63
2005-09-30 121
2005-12-31 23
2006-03-31 24
2006-06-30 18
2006-09-30 16
2006-12-31 45
2007-03-31 352
2007-06-30 191
2007-09-30 57
2007-12-31 219
2008-03-31 2265
2008-06-30 121
2008-09-30 447
2008-12-31 270
2009-03-31 82
2009-06-30 433
2009-09-30 227
2009-12-31 249
2010-03-31 278
2010-06-30 360
2010-09-30 315
2010-12-31 406
2011-03-31 517
2011-06-30 516
2011-09-30 541
2011-12-31 481
2012-03-31 410
2012-06-30 440
2012-09-30 400
2012-12-31 371
2013-03-31 383
2013-06-30 376
2013-09-30 399
2013-12-31 396
2014-03-31 403
2014-06-30 406
2014-09-30 416
2014-12-31 442
2015-03-31 403
2015-06-30 461
2015-09-30 465
2015-12-31 468
2016-03-31 446
2016-06-30 400
2016-09-30 445
2016-12-31 296
2017-03-31 262
2017-06-30 255
2017-09-30 254
2017-12-31 246
2018-03-31 241
2018-06-30 213
2018-09-30 202
2018-12-31 200
2019-03-31 194
2019-06-30 166
2019-09-30 163
2019-12-31 151
2020-03-31 224
2020-06-30 238
2020-09-30 232
2020-12-31 233
2021-03-31 134
2021-06-30 106
2021-09-30 105
2021-12-31 98
2022-03-31 112
2022-06-30 79
2022-09-30 88
2022-12-31 97
2023-03-31 69
2023-06-30 46
2023-09-30 43