Quarter	US dollars
1986-09-30	38000
1986-12-31	38000
1987-03-31	42000
1987-06-30	43000
1987-09-30	44000
1987-12-31	51000
1988-03-31	52000
1988-06-30	50000
1988-09-30	50000
1988-12-31	51000
1989-03-31	55000
1989-06-30	54000
1989-09-30	57000
1989-12-31	63000
1990-03-31	74000
1990-06-30	77000
1990-09-30	87000
1990-12-31	96000
1991-03-31	91000
1991-06-30	87000
1991-09-30	96000
1991-12-31	102000
1992-03-31	102000
1992-06-30	110000
1992-09-30	138000
1992-12-31	129000
1993-03-31	139000
1993-06-30	137000
1993-09-30	147000
1993-12-31	149000
1994-03-31	161000
1994-06-30	171000
1994-09-30	177000
1994-12-31	202000
1995-03-31	237000
1995-06-30	266000
1995-09-30	277000
1995-12-31	271000
1996-03-31	268000
1996-06-30	276000
1996-09-30	277000
1996-12-31	275000
1997-03-31	276000
1997-06-30	288000
1997-09-30	312000
1997-12-31	324000
1998-03-31	351000
1998-06-30	372000
1998-09-30	374000
1998-12-31	388000
1999-03-31	366604
1999-06-30	405600
1999-09-30	393506
1999-12-31	386149
2000-03-31	419955
2000-06-30	397527
2000-09-30	390425
2000-12-31	405685
2001-03-31	448037
2001-06-30	424365
2001-09-30	433091
2001-12-31	407907
2002-03-31	412710
2002-06-30	427383
2002-09-30	444538
2002-12-31	462482
2003-03-31	510209
2003-06-30	558532
2003-09-30	575654
2003-12-31	611159
2004-03-31	682780
2004-06-30	644747
2004-09-30	627923
2004-12-31	706411
2005-03-31	758709
2005-06-30	746559
2005-09-30	718265
2005-12-31	695319
2006-03-31	790534
2006-06-30	822960
2006-09-30	806894
2006-12-31	808032
2007-03-31	907781
2007-06-30	935835
2007-09-30	992256
2007-12-31	958671
2008-03-31	1015331
2008-06-30	969957
2008-09-30	905525
2008-12-31	728740
2009-03-31	662287
2009-06-30	683147
2009-09-30	649779
2009-12-31	651846
2010-03-31	627701
2010-06-30	609260
2010-09-30	658366
2010-12-31	642823
2011-03-31	649412
2011-06-30	641883
2011-09-30	634688
2011-12-31	558411
2012-03-31	565333
2012-06-30	517148
2012-09-30	518441
2012-12-31	502131
2013-03-31	501702
2013-06-30	472767
2013-09-30	448311
2013-12-31	440906
2014-03-31	478777
2014-06-30	486225
2014-09-30	450708
2014-12-31	424400
2015-03-31	436121
2015-06-30	421563
2015-09-30	393750
2015-12-31	399488
2016-03-31	408499
2016-06-30	433362
2016-09-30	428410
2016-12-31	373151
2017-03-31	371140
2017-06-30	382136
2017-09-30	378868
2017-12-31	385001
2018-03-31	382404
2018-06-30	318596
2018-09-30	328063
2018-12-31	312208
2019-03-31	352739
2019-06-30	369585
2019-09-30	374379
2019-12-31	340696
2020-03-31	402672
2020-06-30	370236
2020-09-30	413679
2020-12-31	373326
2021-03-31	361277
2021-06-30	364238
2021-09-30	392633
2021-12-31	394829
2022-03-31	404078
2022-06-30	349215
2022-09-30	333865
2022-12-31	323155
2023-03-31	341337
2023-06-30	323708
2023-09-30	328117