Quarter	US dollars
1986-09-30	25717
1986-12-31	26929
1987-03-31	31036
1987-06-30	32133
1987-09-30	33151
1987-12-31	40641
1988-03-31	40492
1988-06-30	38517
1988-09-30	38350
1988-12-31	44311
1989-03-31	42250
1989-06-30	41314
1989-09-30	45584
1989-12-31	45929
1990-03-31	50004
1990-06-30	59458
1990-09-30	65367
1990-12-31	68303
1991-03-31	62322
1991-06-30	58176
1991-09-30	63908
1991-12-31	67126
1992-03-31	64779
1992-06-30	72401
1992-09-30	68350
1992-12-31	58254
1993-03-31	57965
1993-06-30	57070
1993-09-30	57234
1993-12-31	54692
1994-03-31	54107
1994-06-30	53629
1994-09-30	54672
1994-12-31	54187
1995-03-31	50632
1995-06-30	49297
1995-09-30	49736
1995-12-31	53807
1996-03-31	56616
1996-06-30	58194
1996-09-30	59873
1996-12-31	65337
1997-03-31	63681
1997-06-30	71613
1997-09-30	67479
1997-12-31	75506
1998-03-31	69578
1998-06-30	73223
1998-09-30	78317
1998-12-31	71521
1999-03-31	73826
1999-06-30	76293
1999-09-30	78266
1999-12-31	75398
2000-03-31	82701
2000-06-30	78376
2000-09-30	82111
2000-12-31	81538
2001-03-31	79669
2001-06-30	77306
2001-09-30	82668
2001-12-31	83158
2002-03-31	81583
2002-06-30	88362
2002-09-30	92906
2002-12-31	103185
2003-03-31	96543
2003-06-30	102488
2003-09-30	110947
2003-12-31	117563
2004-03-31	134248
2004-06-30	135216
2004-09-30	130514
2004-12-31	150731
2005-03-31	153436
2005-06-30	146788
2005-09-30	156722
2005-12-31	165685
2006-03-31	178821
2006-06-30	207330
2006-09-30	196905
2006-12-31	217147
2007-03-31	234132
2007-06-30	255865
2007-09-30	300342
2007-12-31	299634
2008-03-31	301536
2008-06-30	325801
2008-09-30	312400
2008-12-31	235845
2009-03-31	233419
2009-06-30	259118
2009-09-30	233808
2009-12-31	245321
2010-03-31	248453
2010-06-30	241737
2010-09-30	254006
2010-12-31	253899
2011-03-31	255494
2011-06-30	256034
2011-09-30	260016
2011-12-31	249276
2012-03-31	276848
2012-06-30	263870
2012-09-30	282110
2012-12-31	281033
2013-03-31	260819
2013-06-30	253667
2013-09-30	246453
2013-12-31	270737
2014-03-31	233130
2014-06-30	244390
2014-09-30	237599
2014-12-31	232307
2015-03-31	216690
2015-06-30	222701
2015-09-30	202915
2015-12-31	196318