Quarterly US dollars
1986-09-30 71
1986-12-31 65
1987-03-31 70
1987-06-30 75
1987-09-30 57
1987-12-31 56
1988-03-31 63
1988-06-30 49
1988-09-30 53
1988-12-31 48
1989-03-31 36
1989-06-30 47
1989-09-30 58
1989-12-31 57
1990-03-31 56
1990-06-30 62
1990-09-30 93
1990-12-31 57
1991-03-31 61
1991-06-30 53
1991-09-30 50
1991-12-31 54
1992-03-31 55
1992-06-30 57
1992-09-30 53
1992-12-31 49
1993-03-31 43
1993-06-30 34
1993-09-30 31
1993-12-31 49
1994-03-31 47
1994-06-30 49
1994-09-30 48
1994-12-31 52
1995-03-31 60
1995-06-30 80
1995-09-30 46
1995-12-31 70
1996-03-31 60
1996-06-30 45
1996-09-30 85
1996-12-31 83
1997-03-31 72
1997-06-30 85
1997-09-30 112
1997-12-31 77
1998-03-31 64
1998-06-30 43
1998-09-30 43
1998-12-31 93
1999-03-31 38
1999-06-30 51
1999-09-30 46
1999-12-31 42
2000-03-31 64
2000-06-30 82
2000-09-30 65
2000-12-31 88
2001-03-31 93
2001-06-30 102
2001-09-30 124
2001-12-31 129
2002-03-31 164
2002-06-30 191
2002-09-30 156
2002-12-31 134
2003-03-31 81
2003-06-30 54
2003-09-30 81
2003-12-31 102
2004-03-31 103
2004-06-30 90
2004-09-30 109
2004-12-31 116
2005-03-31 131
2005-06-30 136
2005-09-30 107
2005-12-31 107
2006-03-31 122
2006-06-30 212
2006-09-30 156
2006-12-31 232
2007-03-31 240
2007-06-30 285
2007-09-30 349
2007-12-31 275
2008-03-31 269
2008-06-30 280
2008-09-30 366
2008-12-31 267
2009-03-31 236
2009-06-30 260
2009-09-30 298
2009-12-31 300
2010-03-31 306
2010-06-30 286
2010-09-30 288
2010-12-31 291
2011-03-31 336
2011-06-30 634
2011-09-30 369
2011-12-31 317
2012-03-31 332
2012-06-30 313
2012-09-30 265
2012-12-31 240
2013-03-31 269
2013-06-30 309
2013-09-30 360
2013-12-31 291
2014-03-31 365
2014-06-30 285
2014-09-30 245
2014-12-31 235
2015-03-31 229
2015-06-30 228
2015-09-30 246
2015-12-31 244
2016-03-31 216
2016-06-30 234
2016-09-30 143
2016-12-31 154
2017-03-31 160
2017-06-30 155
2017-09-30 158
2017-12-31 114
2018-03-31 106
2018-06-30 131
2018-09-30 150
2018-12-31 152
2019-03-31 128
2019-06-30 91
2019-09-30 144
2019-12-31 174
2020-03-31 162
2020-06-30 165
2020-09-30 145
2020-12-31 172
2021-03-31 161
2021-06-30 175
2021-09-30 164
2021-12-31 146
2022-03-31 132
2022-06-30 126
2022-09-30 142
2022-12-31 132
2023-03-31 165
2023-06-30 161
2023-09-30 73