Quarter	US dollars
1986-09-30	684
1986-12-31	706
1987-03-31	755
1987-06-30	760
1987-09-30	712
1987-12-31	760
1988-03-31	735
1988-06-30	710
1988-09-30	687
1988-12-31	696
1989-03-31	669
1989-06-30	735
1989-09-30	747
1989-12-31	752
1990-03-31	768
1990-06-30	696
1990-09-30	712
1990-12-31	691
1991-03-31	601
1991-06-30	473
1991-09-30	452
1991-12-31	452
1992-03-31	431
1992-06-30	478
1992-09-30	477
1992-12-31	486
1993-03-31	456
1993-06-30	388
1993-09-30	357
1993-12-31	384
1994-03-31	427
1994-06-30	416
1994-09-30	383
1994-12-31	387
1995-03-31	369
1995-06-30	414
1995-09-30	391
1995-12-31	338
1996-03-31	323
1996-06-30	388
1996-09-30	635
1996-12-31	554
1997-03-31	589
1997-06-30	475
1997-09-30	340
1997-12-31	332
1998-03-31	460
1998-06-30	528
1998-09-30	581
1998-12-31	581
1999-03-31	482
1999-06-30	594
1999-09-30	765
1999-12-31	767
2000-03-31	713
2000-06-30	721
2000-09-30	692
2000-12-31	572
2001-03-31	580
2001-06-30	557
2001-09-30	563
2001-12-31	588
2002-03-31	577
2002-06-30	615
2002-09-30	526
2002-12-31	484
2003-03-31	501
2003-06-30	513
2003-09-30	525
2003-12-31	575
2004-03-31	613
2004-06-30	623
2004-09-30	621
2004-12-31	708
2005-03-31	732
2005-06-30	675
2005-09-30	678
2005-12-31	798
2006-03-31	950
2006-06-30	910
2006-09-30	915
2006-12-31	861
2007-03-31	866
2007-06-30	774
2007-09-30	616
2007-12-31	641
2008-03-31	607
2008-06-30	547
2008-09-30	397
2008-12-31	316
2009-03-31	239
2009-06-30	285
2009-09-30	204
2009-12-31	365
2010-03-31	508
2010-06-30	503
2010-09-30	552
2010-12-31	561
2011-03-31	600
2011-06-30	807
2011-09-30	750
2011-12-31	1234
2012-03-31	754
2012-06-30	809
2012-09-30	930
2012-12-31	1099
2013-03-31	1038
2013-06-30	928
2013-09-30	918
2013-12-31	894
2014-03-31	1091
2014-06-30	1203
2014-09-30	1230
2014-12-31	1070
2015-03-31	1002
2015-06-30	818
2015-09-30	706
2015-12-31	781
2016-03-31	813
2016-06-30	937
2016-09-30	864
2016-12-31	951
2017-03-31	790
2017-06-30	867
2017-09-30	713
2017-12-31	668
2018-03-31	504
2018-06-30	433
2018-09-30	519
2018-12-31	371
2019-03-31	495
2019-06-30	551
2019-09-30	324
2019-12-31	392
2020-03-31	434
2020-06-30	301
2020-09-30	446
2020-12-31	612
2021-03-31	557
2021-06-30	658
2021-09-30	739
2021-12-31	763
2022-03-31	724
2022-06-30	828
2022-09-30	684
2022-12-31	719
2023-03-31	622
2023-06-30	567
2023-09-30	338