Quarterly US dollars
1986-09-30 57322
1986-12-31 62620
1987-03-31 69882
1987-06-30 68875
1987-09-30 68233
1987-12-31 79718
1988-03-31 78084
1988-06-30 73358
1988-09-30 72380
1988-12-31 76005
1989-03-31 74220
1989-06-30 78188
1989-09-30 82030
1989-12-31 85825
1990-03-31 96483
1990-06-30 101837
1990-09-30 118003
1990-12-31 122218
1991-03-31 118367
1991-06-30 114442
1991-09-30 121578
1991-12-31 121335
1992-03-31 119321
1992-06-30 127580
1992-09-30 149418
1992-12-31 153170
1993-03-31 167639
1993-06-30 164195
1993-09-30 176509
1993-12-31 175252
1994-03-31 174694
1994-06-30 184529
1994-09-30 188366
1994-12-31 188916
1995-03-31 223238
1995-06-30 230725
1995-09-30 224413
1995-12-31 242365
1996-03-31 242414
1996-06-30 250872
1996-09-30 268594
1996-12-31 273834
1997-03-31 260233
1997-06-30 260936
1997-09-30 264622
1997-12-31 277620
1998-03-31 294409
1998-06-30 319226
1998-09-30 359421
1998-12-31 323395
1999-03-31 65304
1999-06-30 59777
1999-09-30 62764
1999-12-31 62187
2000-03-31 63282
2000-06-30 66162
2000-09-30 71302
2000-12-31 70024
2001-03-31 69138
2001-06-30 65790
2001-09-30 70931
2001-12-31 69832
2002-03-31 75957
2002-06-30 76895
2002-09-30 82158
2002-12-31 79604
2003-03-31 80606
2003-06-30 94751
2003-09-30 94776
2003-12-31 95562
2004-03-31 115406
2004-06-30 112409
2004-09-30 122842
2004-12-31 108152
2005-03-31 115916
2005-06-30 121749
2005-09-30 119442
2005-12-31 118826
2006-03-31 137323
2006-06-30 148297
2006-09-30 164846
2006-12-31 149884
2007-03-31 178492
2007-06-30 191269
2007-09-30 200888
2007-12-31 177644
2008-03-31 219524
2008-06-30 210163
2008-09-30 201992
2008-12-31 135352
2009-03-31 135304
2009-06-30 143334
2009-09-30 148559
2009-12-31 134829
2010-03-31 144179
2010-06-30 125221
2010-09-30 130304
2010-12-31 134921
2011-03-31 130228
2011-06-30 130763
2011-09-30 158252
2011-12-31 141730
2012-03-31 146177
2012-06-30 151811
2012-09-30 157268
2012-12-31 153646
2013-03-31 145229
2013-06-30 120225
2013-09-30 126476
2013-12-31 122672
2014-03-31 118301
2014-06-30 121855
2014-09-30 126080
2014-12-31 114132
2015-03-31 127469
2015-06-30 117015
2015-09-30 107190
2015-12-31 116374