Quarterly US dollars
1986-09-30 5901
1986-12-31 4988
1987-03-31 4677
1987-06-30 5289
1987-09-30 5108
1987-12-31 6370
1988-03-31 6589
1988-06-30 6553
1988-09-30 6724
1988-12-31 7487
1989-03-31 7339
1989-06-30 7586
1989-09-30 8710
1989-12-31 9978
1990-03-31 10372
1990-06-30 11692
1990-09-30 13408
1990-12-31 13209
1991-03-31 11007
1991-06-30 10475
1991-09-30 10704
1991-12-31 11667
1992-03-31 9444
1992-06-30 11236
1992-09-30 9586
1992-12-31 8061
1993-03-31 7532
1993-06-30 8317
1993-09-30 8747
1993-12-31 8685
1994-03-31 9264
1994-06-30 10319
1994-09-30 10702
1994-12-31 10782
1995-03-31 11976
1995-06-30 12414
1995-09-30 11865
1995-12-31 12018
1996-03-31 10975
1996-06-30 11784
1996-09-30 15120
1996-12-31 13721
1997-03-31 12860
1997-06-30 12577
1997-09-30 11006
1997-12-31 13715
1998-03-31 16427
1998-06-30 16851
1998-09-30 17722
1998-12-31 15634
1999-03-31 8792
1999-06-30 9388
1999-09-30 10842
1999-12-31 10611
2000-03-31 11268
2000-06-30 10246
2000-09-30 7588
2000-12-31 11111
2001-03-31 6694
2001-06-30 11051
2001-09-30 11270
2001-12-31 11595
2002-03-31 12555
2002-06-30 13962
2002-09-30 15074
2002-12-31 16688
2003-03-31 15644
2003-06-30 17850
2003-09-30 17538
2003-12-31 19139
2004-03-31 19263
2004-06-30 19358
2004-09-30 19782
2004-12-31 22551
2005-03-31 24023
2005-06-30 27074
2005-09-30 27858
2005-12-31 27523
2006-03-31 27079
2006-06-30 30446
2006-09-30 30259
2006-12-31 39325
2007-03-31 44124
2007-06-30 45867
2007-09-30 49826
2007-12-31 61496
2008-03-31 60222
2008-06-30 52557
2008-09-30 39295
2008-12-31 55929
2009-03-31 38589
2009-06-30 30052
2009-09-30 24559
2009-12-31 24492
2010-03-31 29444
2010-06-30 44546
2010-09-30 45655
2010-12-31 50734
2011-03-31 51593
2011-06-30 48603
2011-09-30 52486
2011-12-31 48930
2012-03-31 45802
2012-06-30 51482
2012-09-30 61478
2012-12-31 64551
2013-03-31 65651
2013-06-30 66041
2013-09-30 75723
2013-12-31 78428
2014-03-31 84359
2014-06-30 82678
2014-09-30 69689
2014-12-31 72116
2015-03-31 68505
2015-06-30 70324
2015-09-30 69009
2015-12-31 61936