Quarter	US dollars
1986-09-30	1244
1986-12-31	1342
1987-03-31	1217
1987-06-30	1170
1987-09-30	1077
1987-12-31	1035
1988-03-31	981
1988-06-30	941
1988-09-30	959
1988-12-31	853
1989-03-31	913
1989-06-30	793
1989-09-30	678
1989-12-31	650
1990-03-31	631
1990-06-30	650
1990-09-30	664
1990-12-31	645
1991-03-31	652
1991-06-30	584
1991-09-30	541
1991-12-31	542
1992-03-31	607
1992-06-30	619
1992-09-30	542
1992-12-31	512
1993-03-31	506
1993-06-30	435
1993-09-30	432
1993-12-31	481
1994-03-31	447
1994-06-30	485
1994-09-30	450
1994-12-31	510
1995-03-31	662
1995-06-30	761
1995-09-30	716
1995-12-31	765
1996-03-31	805
1996-06-30	903
1996-09-30	867
1996-12-31	1067
1997-03-31	1212
1997-06-30	1425
1997-09-30	1650
1997-12-31	1907
1998-03-31	1264
1998-06-30	1654
1998-09-30	1478
1998-12-31	1422
1999-03-31	1604
1999-06-30	1606
1999-09-30	1223
1999-12-31	1702
2000-03-31	1148
2000-06-30	1203
2000-09-30	1058
2000-12-31	1194
2001-03-31	1202
2001-06-30	1320
2001-09-30	1543
2001-12-31	1564
2002-03-31	1879
2002-06-30	2045
2002-09-30	2093
2002-12-31	2062
2003-03-31	2973
2003-06-30	2244
2003-09-30	2280
2003-12-31	2678
2004-03-31	2524
2004-06-30	2327
2004-09-30	2364
2004-12-31	2358
2005-03-31	2199
2005-06-30	2420
2005-09-30	2192
2005-12-31	2129
2006-03-31	2937
2006-06-30	2672
2006-09-30	2398
2006-12-31	3311
2007-03-31	3404
2007-06-30	4700
2007-09-30	3234
2007-12-31	2692
2008-03-31	3325
2008-06-30	2811
2008-09-30	2590
2008-12-31	2758
2009-03-31	2649
2009-06-30	2525
2009-09-30	3756
2009-12-31	3795
2010-03-31	4894
2010-06-30	6743
2010-09-30	6873
2010-12-31	7850
2011-03-31	10043
2011-06-30	10132
2011-09-30	8959
2011-12-31	6424
2012-03-31	5040
2012-06-30	5372
2012-09-30	4170
2012-12-31	4710
2013-03-31	4902
2013-06-30	5470
2013-09-30	4914
2013-12-31	4374
2014-03-31	5542
2014-06-30	4581
2014-09-30	5019
2014-12-31	4247
2015-03-31	4274
2015-06-30	4417
2015-09-30	3829
2015-12-31	4299
2016-03-31	3962
2016-06-30	3643
2016-09-30	3733
2016-12-31	4139
2017-03-31	3970
2017-06-30	3726
2017-09-30	3831
2017-12-31	3623
2018-03-31	3683
2018-06-30	4140
2018-09-30	4313
2018-12-31	3239
2019-03-31	3146
2019-06-30	3804
2019-09-30	3654
2019-12-31	4201
2020-03-31	6469
2020-06-30	4318
2020-09-30	4265
2020-12-31	10683
2021-03-31	11690
2021-06-30	11095
2021-09-30	10918
2021-12-31	19815
2022-03-31	14328
2022-06-30	12542
2022-09-30	17639
2022-12-31	13898
2023-03-31	17344
2023-06-30	18562
2023-09-30	16509