Quarter	US dollars
1986-09-30	862
1986-12-31	519
1987-03-31	493
1987-06-30	601
1987-09-30	554
1987-12-31	539
1988-03-31	554
1988-06-30	297
1988-09-30	360
1988-12-31	391
1989-03-31	268
1989-06-30	297
1989-09-30	359
1989-12-31	235
1990-03-31	365
1990-06-30	293
1990-09-30	235
1990-12-31	316
1991-03-31	131
1991-06-30	202
1991-09-30	312
1991-12-31	492
1992-03-31	318
1992-06-30	425
1992-09-30	627
1992-12-31	420
1993-03-31	869
1993-06-30	570
1993-09-30	750
1993-12-31	535
1994-03-31	184
1994-06-30	426
1994-09-30	417
1994-12-31	459
1995-03-31	328
1995-06-30	228
1995-09-30	175
1995-12-31	64
1996-03-31	45
1996-06-30	64
1996-09-30	84
1996-12-31	85
1997-03-31	87
1997-06-30	533
1997-09-30	605
1997-12-31	718
1998-03-31	723
1998-06-30	427
1998-09-30	601
1998-12-31	468
1999-03-31	361
1999-06-30	478
1999-09-30	618
1999-12-31	653
2000-03-31	846
2000-06-30	1068
2000-09-30	1091
2000-12-31	1009
2001-03-31	1022
2001-06-30	1048
2001-09-30	1373
2001-12-31	1252
2002-03-31	1117
2002-06-30	1281
2002-09-30	1127
2002-12-31	1175
2003-03-31	1147
2003-06-30	941
2003-09-30	932
2003-12-31	987
2004-03-31	1001
2004-06-30	934
2004-09-30	723
2004-12-31	746
2005-03-31	640
2005-06-30	817
2005-09-30	585
2005-12-31	671
2006-03-31	994
2006-06-30	1095
2006-09-30	1106
2006-12-31	2395
2007-03-31	2555
2007-06-30	2492
2007-09-30	2439
2007-12-31	2885
2008-03-31	3194
2008-06-30	3098
2008-09-30	1740
2008-12-31	722
2009-03-31	708
2009-06-30	740
2009-09-30	815
2009-12-31	635
2010-03-31	834
2010-06-30	938
2010-09-30	776
2010-12-31	915
2011-03-31	750
2011-06-30	879
2011-09-30	876
2011-12-31	548
2012-03-31	578
2012-06-30	945
2012-09-30	848
2012-12-31	632
2013-03-31	906
2013-06-30	1119
2013-09-30	802
2013-12-31	648
2014-03-31	1036
2014-06-30	1015
2014-09-30	999
2014-12-31	770
2015-03-31	897
2015-06-30	789
2015-09-30	707
2015-12-31	724
2016-03-31	683
2016-06-30	789
2016-09-30	820
2016-12-31	776
2017-03-31	597
2017-06-30	770
2017-09-30	757
2017-12-31	746
2018-03-31	751
2018-06-30	748
2018-09-30	660
2018-12-31	662
2019-03-31	667
2019-06-30	683
2019-09-30	736
2019-12-31	665
2020-03-31	474
2020-06-30	377
2020-09-30	409
2020-12-31	328
2021-03-31	352
2021-06-30	280
2021-09-30	261
2021-12-31	242
2022-03-31	214
2022-06-30	225
2022-09-30	300
2022-12-31	289
2023-03-31	331
2023-06-30	329
2023-09-30	353