Quarterly US dollars
1986-09-30 35011
1986-12-31 36911
1987-03-31 40110
1987-06-30 39297
1987-09-30 37408
1987-12-31 46128
1988-03-31 40062
1988-06-30 33500
1988-09-30 33107
1988-12-31 34781
1989-03-31 31258
1989-06-30 32063
1989-09-30 32755
1989-12-31 33123
1990-03-31 37766
1990-06-30 39116
1990-09-30 48528
1990-12-31 49801
1991-03-31 43472
1991-06-30 40538
1991-09-30 41117
1991-12-31 39656
1992-03-31 35326
1992-06-30 38279
1992-09-30 44013
1992-12-31 36245
1993-03-31 34403
1993-06-30 29437
1993-09-30 30492
1993-12-31 33085
1994-03-31 33044
1994-06-30 37024
1994-09-30 38497
1994-12-31 38773
1995-03-31 42878
1995-06-30 45417
1995-09-30 39454
1995-12-31 38854
1996-03-31 40512
1996-06-30 38507
1996-09-30 40924
1996-12-31 40632
1997-03-31 40763
1997-06-30 41437
1997-09-30 41526
1997-12-31 40684
1998-03-31 40649
1998-06-30 40447
1998-09-30 44100
1998-12-31 41125
1999-03-31 35016
1999-06-30 30326
1999-09-30 33463
1999-12-31 30103
2000-03-31 35700
2000-06-30 34778
2000-09-30 34011
2000-12-31 40481
2001-03-31 38609
2001-06-30 37992
2001-09-30 41088
2001-12-31 42007
2002-03-31 42014
2002-06-30 44280
2002-09-30 44763
2002-12-31 47513
2003-03-31 54729
2003-06-30 50878
2003-09-30 50418
2003-12-31 48437
2004-03-31 47030
2004-06-30 49008
2004-09-30 50328
2004-12-31 50098
2005-03-31 51776
2005-06-30 52101
2005-09-30 49843
2005-12-31 50193
2006-03-31 61566
2006-06-30 61499
2006-09-30 54551
2006-12-31 59804
2007-03-31 67800
2007-06-30 73022
2007-09-30 74083
2007-12-31 78987
2008-03-31 90924
2008-06-30 82186
2008-09-30 78953
2008-12-31 70111
2009-03-31 62779
2009-06-30 61478
2009-09-30 59186
2009-12-31 60683
2010-03-31 58487
2010-06-30 56212
2010-09-30 58708
2010-12-31 58879
2011-03-31 65841
2011-06-30 64495
2011-09-30 70750
2011-12-31 101642
2012-03-31 68177
2012-06-30 71507
2012-09-30 71437
2012-12-31 65197
2013-03-31 62940
2013-06-30 62745
2013-09-30 65607
2013-12-31 65977
2014-03-31 64166
2014-06-30 61771
2014-09-30 59609
2014-12-31 53634
2015-03-31 55606
2015-06-30 42952
2015-09-30 37537
2015-12-31 37741