Quarter	US dollars
1986-09-30	15711
1986-12-31	14825
1987-03-31	15226
1987-06-30	14552
1987-09-30	14483
1987-12-31	17174
1988-03-31	16473
1988-06-30	16416
1988-09-30	16337
1988-12-31	16362
1989-03-31	16732
1989-06-30	17040
1989-09-30	16140
1989-12-31	17632
1990-03-31	16538
1990-06-30	17360
1990-09-30	18269
1990-12-31	19383
1991-03-31	18673
1991-06-30	19305
1991-09-30	18739
1991-12-31	19402
1992-03-31	19762
1992-06-30	22316
1992-09-30	27355
1992-12-31	26369
1993-03-31	22458
1993-06-30	22756
1993-09-30	21723
1993-12-31	21583
1994-03-31	22023
1994-06-30	26487
1994-09-30	28895
1994-12-31	31993
1995-03-31	33626
1995-06-30	28730
1995-09-30	25634
1995-12-31	28587
1996-03-31	28002
1996-06-30	27635
1996-09-30	30319
1996-12-31	29989
1997-03-31	35023
1997-06-30	38905
1997-09-30	36629
1997-12-31	34172
1998-03-31	43005
1998-06-30	47305
1998-09-30	45208
1998-12-31	43908
1999-03-31	36031
1999-06-30	42737
1999-09-30	36471
1999-12-31	31710
2000-03-31	35258
2000-06-30	32861
2000-09-30	30810
2000-12-31	33271
2001-03-31	34815
2001-06-30	34916
2001-09-30	40700
2001-12-31	40056
2002-03-31	38760
2002-06-30	36754
2002-09-30	44737
2002-12-31	39166
2003-03-31	47910
2003-06-30	48998
2003-09-30	52473
2003-12-31	66191
2004-03-31	84580
2004-06-30	74787
2004-09-30	71369
2004-12-31	83488
2005-03-31	79102
2005-06-30	80331
2005-09-30	92891
2005-12-31	86583
2006-03-31	84785
2006-06-30	96128
2006-09-30	83168
2006-12-31	87580
2007-03-31	95419
2007-06-30	103009
2007-09-30	116967
2007-12-31	135124
2008-03-31	161788
2008-06-30	167192
2008-09-30	147830
2008-12-31	179942
2009-03-31	96432
2009-06-30	106492
2009-09-30	116494
2009-12-31	97607
2010-03-31	99301
2010-06-30	103954
2010-09-30	97852
2010-12-31	105602
2011-03-31	104469
2011-06-30	114347
2011-09-30	104724
2011-12-31	116097
2012-03-31	137057
2012-06-30	134918
2012-09-30	120416
2012-12-31	118052
2013-03-31	107013
2013-06-30	115892
2013-09-30	94381
2013-12-31	103693
2014-03-31	110626
2014-06-30	107169
2014-09-30	102802
2014-12-31	93366
2015-03-31	98657
2015-06-30	99208
2015-09-30	108743
2015-12-31	118034
2016-03-31	117569
2016-06-30	116136
2016-09-30	126909
2016-12-31	124713
2017-03-31	124887
2017-06-30	140807
2017-09-30	138355
2017-12-31	141479
2018-03-31	147334
2018-06-30	129502
2018-09-30	136131
2018-12-31	134261
2019-03-31	126202
2019-06-30	124148
2019-09-30	140126
2019-12-31	133079
2020-03-31	141074
2020-06-30	133091
2020-09-30	122813
2020-12-31	150871
2021-03-31	142663
2021-06-30	161480
2021-09-30	147045
2021-12-31	166417
2022-03-31	160355
2022-06-30	160240
2022-09-30	141830
2022-12-31	148243
2023-03-31	148997
2023-06-30	141515
2023-09-30	140498