Quarterly US dollars
1986-09-30 267
1986-12-31 269
1987-03-31 316
1987-06-30 319
1987-09-30 307
1987-12-31 376
1988-03-31 364
1988-06-30 335
1988-09-30 302
1988-12-31 344
1989-03-31 300
1989-06-30 279
1989-09-30 277
1989-12-31 313
1990-03-31 289
1990-06-30 230
1990-09-30 251
1990-12-31 270
1991-03-31 228
1991-06-30 224
1991-09-30 233
1991-12-31 224
1992-03-31 199
1992-06-30 197
1992-09-30 204
1992-12-31 153
1993-03-31 138
1993-06-30 124
1993-09-30 129
1993-12-31 100
1994-03-31 113
1994-06-30 103
1994-09-30 101
1994-12-31 101
1995-03-31 127
1995-06-30 117
1995-09-30 117
1995-12-31 173
1996-03-31 120
1996-06-30 110
1996-09-30 107
1996-12-31 115
1997-03-31 101
1997-06-30 117
1997-09-30 104
1997-12-31 151
1998-03-31 160
1998-06-30 142
1998-09-30 148
1998-12-31 143
1999-03-31 106
1999-06-30 78
1999-09-30 79
1999-12-31 79
2000-03-31 101
2000-06-30 101
2000-09-30 84
2000-12-31 90
2001-03-31 93
2001-06-30 82
2001-09-30 88
2001-12-31 93
2002-03-31 87
2002-06-30 92
2002-09-30 93
2002-12-31 99
2003-03-31 99
2003-06-30 95
2003-09-30 95
2003-12-31 94
2004-03-31 96
2004-06-30 99
2004-09-30 108
2004-12-31 104
2005-03-31 96
2005-06-30 77
2005-09-30 101
2005-12-31 140
2006-03-31 227
2006-06-30 228
2006-09-30 247
2006-12-31 200
2007-03-31 164
2007-06-30 160
2007-09-30 194
2007-12-31 180
2008-03-31 199
2008-06-30 177
2008-09-30 148
2008-12-31 143
2009-03-31 129
2009-06-30 123
2009-09-30 123
2009-12-31 122
2010-03-31 111
2010-06-30 98
2010-09-30 107
2010-12-31 99
2011-03-31 135
2011-06-30 113
2011-09-30 93
2011-12-31 96
2012-03-31 84
2012-06-30 57
2012-09-30 64
2012-12-31 44
2013-03-31 36
2013-06-30 17
2013-09-30 12
2013-12-31 6
2014-03-31 7
2014-06-30 2
2014-09-30 2
2014-12-31 2
2015-03-31 2
2015-06-30 10
2015-09-30 10
2015-12-31 9
2016-03-31 10
2016-06-30 9
2016-09-30 9
2016-12-31 9
2017-03-31 9
2017-06-30 10
2017-09-30 10
2017-12-31 10
2018-03-31 9
2018-06-30 9
2018-09-30 9
2018-12-31 9
2019-03-31 9
2019-06-30 10
2019-09-30 12
2019-12-31 9
2020-03-31 20
2020-06-30 20
2020-09-30 10
2020-12-31 10
2021-03-31 10
2021-06-30 8
2021-09-30 8
2021-12-31 8
2022-03-31 8
2022-06-30 7
2022-09-30 7
2022-12-31 8
2023-03-31 8
2023-06-30 8
2023-09-30 8