Quarter	US dollars
1986-09-30	1262
1986-12-31	1296
1987-03-31	1573
1987-06-30	1606
1987-09-30	1599
1987-12-31	1835
1988-03-31	1826
1988-06-30	2309
1988-09-30	2317
1988-12-31	2261
1989-03-31	2270
1989-06-30	2223
1989-09-30	2295
1989-12-31	2411
1990-03-31	2294
1990-06-30	2570
1990-09-30	2686
1990-12-31	2369
1991-03-31	2287
1991-06-30	2054
1991-09-30	1900
1991-12-31	2231
1992-03-31	2300
1992-06-30	2155
1992-09-30	2216
1992-12-31	2036
1993-03-31	1780
1993-06-30	1840
1993-09-30	1793
1993-12-31	1846
1994-03-31	1990
1994-06-30	2059
1994-09-30	1938
1994-12-31	1889
1995-03-31	2169
1995-06-30	2407
1995-09-30	2373
1995-12-31	2292
1996-03-31	2312
1996-06-30	2407
1996-09-30	2470
1996-12-31	2763
1997-03-31	3205
1997-06-30	4020
1997-09-30	3909
1997-12-31	4343
1998-03-31	4399
1998-06-30	5854
1998-09-30	4229
1998-12-31	3947
1999-03-31	4767
1999-06-30	4609
1999-09-30	5457
1999-12-31	4817
2000-03-31	5104
2000-06-30	4433
2000-09-30	5569
2000-12-31	4703
2001-03-31	5503
2001-06-30	6011
2001-09-30	6992
2001-12-31	6037
2002-03-31	5788
2002-06-30	7989
2002-09-30	6997
2002-12-31	8265
2003-03-31	8683
2003-06-30	12378
2003-09-30	13965
2003-12-31	14079
2004-03-31	16859
2004-06-30	16465
2004-09-30	17042
2004-12-31	17988
2005-03-31	17934
2005-06-30	18865
2005-09-30	21370
2005-12-31	16901
2006-03-31	23693
2006-06-30	28511
2006-09-30	25558
2006-12-31	23993
2007-03-31	24684
2007-06-30	24837
2007-09-30	30188
2007-12-31	27340
2008-03-31	22708
2008-06-30	21584
2008-09-30	21323
2008-12-31	21072
2009-03-31	16875
2009-06-30	17730
2009-09-30	18655
2009-12-31	17429
2010-03-31	17627
2010-06-30	17522
2010-09-30	20331
2010-12-31	22590
2011-03-31	20208
2011-06-30	19118
2011-09-30	17866
2011-12-31	16955
2012-03-31	16381
2012-06-30	22750
2012-09-30	19821
2012-12-31	16657
2013-03-31	17313
2013-06-30	17951
2013-09-30	21365
2013-12-31	20900
2014-03-31	20591
2014-06-30	20077
2014-09-30	19795
2014-12-31	18804
2015-03-31	22615
2015-06-30	23483
2015-09-30	20009
2015-12-31	16644
2016-03-31	19216
2016-06-30	16694
2016-09-30	14398
2016-12-31	15651
2017-03-31	18277
2017-06-30	16113
2017-09-30	17175
2017-12-31	18805
2018-03-31	19657
2018-06-30	13037
2018-09-30	15719
2018-12-31	12197
2019-03-31	15867
2019-06-30	14974
2019-09-30	16446
2019-12-31	15354
2020-03-31	19413
2020-06-30	17809
2020-09-30	18168
2020-12-31	20381
2021-03-31	20161
2021-06-30	20845
2021-09-30	19589
2021-12-31	16094
2022-03-31	20842
2022-06-30	19020
2022-09-30	17917
2022-12-31	16728
2023-03-31	20154
2023-06-30	17594
2023-09-30	17017