Quarter	US dollars
1986-09-30	43187
1986-12-31	44797
1987-03-31	52065
1987-06-30	53028
1987-09-30	56474
1987-12-31	67955
1988-03-31	70610
1988-06-30	63870
1988-09-30	69775
1988-12-31	65971
1989-03-31	69890
1989-06-30	64376
1989-09-30	70170
1989-12-31	71351
1990-03-31	64963
1990-06-30	62136
1990-09-30	64382
1990-12-31	67001
1991-03-31	58734
1991-06-30	60894
1991-09-30	64967
1991-12-31	64429
1992-03-31	61395
1992-06-30	60420
1992-09-30	58756
1992-12-31	56044
1993-03-31	60828
1993-06-30	59400
1993-09-30	63348
1993-12-31	62978
1994-03-31	72693
1994-06-30	72121
1994-09-30	82082
1994-12-31	75615
1995-03-31	100737
1995-06-30	86918
1995-09-30	94039
1995-12-31	95581
1996-03-31	84847
1996-06-30	91932
1996-09-30	82941
1996-12-31	96695
1997-03-31	96004
1997-06-30	105315
1997-09-30	107066
1997-12-31	146590
1998-03-31	122342
1998-06-30	132629
1998-09-30	161649
1998-12-31	176958
1999-03-31	117375
1999-06-30	111598
1999-09-30	134584
1999-12-31	135246
2000-03-31	156874
2000-06-30	164078
2000-09-30	164282
2000-12-31	165399
2001-03-31	131912
2001-06-30	140757
2001-09-30	119495
2001-12-31	112428
2002-03-31	105575
2002-06-30	114882
2002-09-30	121929
2002-12-31	127641
2003-03-31	132096
2003-06-30	119210
2003-09-30	130598
2003-12-31	122668
2004-03-31	125047
2004-06-30	124599
2004-09-30	138079
2004-12-31	149712
2005-03-31	127215
2005-06-30	128307
2005-09-30	125852
2005-12-31	139531
2006-03-31	116829
2006-06-30	125756
2006-09-30	121643
2006-12-31	108586
2007-03-31	113798
2007-06-30	144464
2007-09-30	186176
2007-12-31	227002
2008-03-31	264641
2008-06-30	229109
2008-09-30	221327
2008-12-31	204330
2009-03-31	142435
2009-06-30	172459
2009-09-30	169439
2009-12-31	112022
2010-03-31	115201
2010-06-30	110704
2010-09-30	98186
2010-12-31	109377
2011-03-31	105265
2011-06-30	102273
2011-09-30	118118
2011-12-31	117027
2012-03-31	100943
2012-06-30	106428
2012-09-30	107117
2012-12-31	109603
2013-03-31	98182
2013-06-30	80411
2013-09-30	87571
2013-12-31	95052
2014-03-31	80810
2014-06-30	82949
2014-09-30	78025
2014-12-31	81649
2015-03-31	69301
2015-06-30	51943
2015-09-30	55221
2015-12-31	69086