Quarterly US dollars
1986-09-30 4616
1986-12-31 8691
1987-03-31 11193
1987-06-30 9127
1987-09-30 10103
1987-12-31 11462
1988-03-31 10935
1988-06-30 9249
1988-09-30 9268
1988-12-31 11062
1989-03-31 10191
1989-06-30 7928
1989-09-30 9092
1989-12-31 11438
1990-03-31 10714
1990-06-30 12488
1990-09-30 16782
1990-12-31 16971
1991-03-31 18671
1991-06-30 16606
1991-09-30 19118
1991-12-31 18675
1992-03-31 12467
1992-06-30 13290
1992-09-30 15664
1992-12-31 15436
1993-03-31 16913
1993-06-30 20814
1993-09-30 24686
1993-12-31 27038
1994-03-31 26432
1994-06-30 28054
1994-09-30 31822
1994-12-31 36053
1995-03-31 74160
1995-06-30 71056
1995-09-30 72672
1995-12-31 66989
1996-03-31 66070
1996-06-30 65164
1996-09-30 65767
1996-12-31 64339
1997-03-31 65576
1997-06-30 68447
1997-09-30 9884
1997-12-31 4872
1998-03-31 3007
1998-06-30 6592
1998-09-30 6546
1998-12-31 10059
1999-03-31 3507
1999-06-30 736
1999-09-30 -1622
1999-12-31 -45
2000-03-31 755
2000-06-30 -2187
2000-09-30 1899
2000-12-31 -381
2001-03-31 2484
2001-06-30 5997
2001-09-30 5879
2001-12-31 3699
2002-03-31 7176
2002-06-30 1147
2002-09-30 881
2002-12-31 3117
2003-03-31 3653
2003-06-30 5549
2003-09-30 7040
2003-12-31 513
2004-03-31 2201
2004-06-30 -502
2004-09-30 -2206
2004-12-31 -4557
2005-03-31 95
2005-06-30 2418
2005-09-30 245
2005-12-31 1864
2006-03-31 5490
2006-06-30 971
2006-09-30 -692
2006-12-31 12147
2007-03-31 -2201
2007-06-30 9254
2007-09-30 9628
2007-12-31 226
2008-03-31 -2595
2008-06-30 8079
2008-09-30 5525
2008-12-31 8771
2009-03-31 2420
2009-06-30 2142
2009-09-30 -2051
2009-12-31 79
2010-03-31 2901
2010-06-30 5473
2010-09-30 1626
2010-12-31 2059
2011-03-31 3967
2011-06-30 1160
2011-09-30 -641
2011-12-31 3580
2012-03-31 6570
2012-06-30 4122
2012-09-30 1321
2012-12-31 2795
2013-03-31 -1673
2013-06-30 3656
2013-09-30 -1160
2013-12-31 -3446
2014-03-31 6702
2014-06-30 5245
2014-09-30 3257
2014-12-31 1047
2015-03-31 5389
2015-06-30 7364
2015-09-30 2043
2015-12-31 -53