Quarter	US dollars
1986-09-30	1792
1986-12-31	1817
1987-03-31	1888
1987-06-30	1883
1987-09-30	1881
1987-12-31	2009
1988-03-31	1903
1988-06-30	2030
1988-09-30	1913
1988-12-31	1939
1989-03-31	1800
1989-06-30	1970
1989-09-30	2079
1989-12-31	2398
1990-03-31	2598
1990-06-30	2657
1990-09-30	3338
1990-12-31	3322
1991-03-31	3148
1991-06-30	3292
1991-09-30	3116
1991-12-31	3187
1992-03-31	3148
1992-06-30	3263
1992-09-30	3446
1992-12-31	3584
1993-03-31	3420
1993-06-30	3661
1993-09-30	4063
1993-12-31	4836
1994-03-31	4277
1994-06-30	3951
1994-09-30	3247
1994-12-31	2876
1995-03-31	2902
1995-06-30	3107
1995-09-30	3483
1995-12-31	3480
1996-03-31	3507
1996-06-30	3703
1996-09-30	4221
1996-12-31	5057
1997-03-31	5188
1997-06-30	5910
1997-09-30	6323
1997-12-31	6304
1998-03-31	6829
1998-06-30	8030
1998-09-30	7636
1998-12-31	6702
1999-03-31	7340
1999-06-30	6847
1999-09-30	7410
1999-12-31	7442
2000-03-31	7700
2000-06-30	8370
2000-09-30	9358
2000-12-31	9808
2001-03-31	8639
2001-06-30	6581
2001-09-30	7317
2001-12-31	6277
2002-03-31	6215
2002-06-30	6281
2002-09-30	5608
2002-12-31	5785
2003-03-31	5776
2003-06-30	5258
2003-09-30	6204
2003-12-31	7067
2004-03-31	8072
2004-06-30	9619
2004-09-30	9503
2004-12-31	10963
2005-03-31	12972
2005-06-30	12642
2005-09-30	13002
2005-12-31	16246
2006-03-31	19364
2006-06-30	17301
2006-09-30	22021
2006-12-31	24646
2007-03-31	24571
2007-06-30	24780
2007-09-30	28036
2007-12-31	28407
2008-03-31	29378
2008-06-30	29769
2008-09-30	28452
2008-12-31	25136
2009-03-31	22135
2009-06-30	23900
2009-09-30	25618
2009-12-31	25678
2010-03-31	26237
2010-06-30	27503
2010-09-30	28820
2010-12-31	32423
2011-03-31	40010
2011-06-30	42982
2011-09-30	32965
2011-12-31	31839
2012-03-31	32152
2012-06-30	37580
2012-09-30	38620
2012-12-31	42308
2013-03-31	41362
2013-06-30	44201
2013-09-30	41548
2013-12-31	43491
2014-03-31	38655
2014-06-30	42229
2014-09-30	41421
2014-12-31	41284
2015-03-31	38487
2015-06-30	38173
2015-09-30	38593
2015-12-31	38840
2016-03-31	41343
2016-06-30	40078
2016-09-30	39929
2016-12-31	33699
2017-03-31	33051
2017-06-30	32073
2017-09-30	33199
2017-12-31	34695
2018-03-31	35568
2018-06-30	36151
2018-09-30	31827
2018-12-31	29010
2019-03-31	30810
2019-06-30	27440
2019-09-30	25549
2019-12-31	24171
2020-03-31	21063
2020-06-30	20539
2020-09-30	22490
2020-12-31	24114
2021-03-31	25213
2021-06-30	23972
2021-09-30	23416
2021-12-31	23817
2022-03-31	22867
2022-06-30	22704
2022-09-30	21824
2022-12-31	22921
2023-03-31	23062
2023-06-30	24120
2023-09-30	23021