Quarter	US dollars
1986-09-30	13843
1986-12-31	15850
1987-03-31	17825
1987-06-30	17079
1987-09-30	17501
1987-12-31	18964
1988-03-31	16792
1988-06-30	16658
1988-09-30	17948
1988-12-31	21001
1989-03-31	18886
1989-06-30	19224
1989-09-30	20045
1989-12-31	23379
1990-03-31	25617
1990-06-30	26921
1990-09-30	29415
1990-12-31	28660
1991-03-31	30476
1991-06-30	28991
1991-09-30	27443
1991-12-31	26619
1992-03-31	26397
1992-06-30	29903
1992-09-30	40054
1992-12-31	36259
1993-03-31	34904
1993-06-30	34219
1993-09-30	36071
1993-12-31	40150
1994-03-31	33161
1994-06-30	39807
1994-09-30	44751
1994-12-31	45557
1995-03-31	39341
1995-06-30	47344
1995-09-30	44072
1995-12-31	44347
1996-03-31	39089
1996-06-30	45523
1996-09-30	46462
1996-12-31	51433
1997-03-31	52487
1997-06-30	56384
1997-09-30	54875
1997-12-31	89225
1998-03-31	61411
1998-06-30	72870
1998-09-30	80046
1998-12-31	81124
1999-03-31	76908
1999-06-30	78670
1999-09-30	89063
1999-12-31	107704
2000-03-31	112683
2000-06-30	120625
2000-09-30	125771
2000-12-31	170185
2001-03-31	140543
2001-06-30	115852
2001-09-30	126040
2001-12-31	135957
2002-03-31	122173
2002-06-30	132849
2002-09-30	127901
2002-12-31	145729
2003-03-31	146951
2003-06-30	163455
2003-09-30	151795
2003-12-31	190578
2004-03-31	213376
2004-06-30	208142
2004-09-30	162206
2004-12-31	169444
2005-03-31	176202
2005-06-30	188626
2005-09-30	179817
2005-12-31	167422
2006-03-31	185783
2006-06-30	212576
2006-09-30	203325
2006-12-31	158029
2007-03-31	277762
2007-06-30	213376
2007-09-30	234349
2007-12-31	364131
2008-03-31	341951
2008-06-30	241337
2008-09-30	250599
2008-12-31	206089
2009-03-31	199292
2009-06-30	243208
2009-09-30	195661
2009-12-31	183072
2010-03-31	194708
2010-06-30	196286
2010-09-30	201393
2010-12-31	209559
2011-03-31	154826
2011-06-30	169627
2011-09-30	208048
2011-12-31	257331
2012-03-31	229594
2012-06-30	239014
2012-09-30	255005
2012-12-31	231642
2013-03-31	235372
2013-06-30	190642
2013-09-30	195985
2013-12-31	208972
2014-03-31	194809
2014-06-30	183113
2014-09-30	194387
2014-12-31	182888
2015-03-31	200630
2015-06-30	193874
2015-09-30	191466
2015-12-31	194407
2016-03-31	169231
2016-06-30	184085
2016-09-30	199521
2016-12-31	213146
2017-03-31	198151
2017-06-30	202101
2017-09-30	192021
2017-12-31	197709
2018-03-31	195091
2018-06-30	228692
2018-09-30	197353
2018-12-31	216985
2019-03-31	199338
2019-06-30	183553
2019-09-30	208425
2019-12-31	228413
2020-03-31	203447
2020-06-30	224168
2020-09-30	242069
2020-12-31	236863
2021-03-31	228849
2021-06-30	224934
2021-09-30	215834
2021-12-31	246956
2022-03-31	245012
2022-06-30	234396
2022-09-30	220917
2022-12-31	243727
2023-03-31	210294
2023-06-30	223248
2023-09-30	232233