Quarter	US dollars
1986-09-30	787
1986-12-31	268
1987-03-31	440
1987-06-30	459
1987-09-30	682
1987-12-31	603
1988-03-31	530
1988-06-30	545
1988-09-30	521
1988-12-31	480
1989-03-31	508
1989-06-30	691
1989-09-30	605
1989-12-31	673
1990-03-31	606
1990-06-30	492
1990-09-30	575
1990-12-31	985
1991-03-31	1105
1991-06-30	1022
1991-09-30	1170
1991-12-31	1058
1992-03-31	1265
1992-06-30	1504
1992-09-30	2012
1992-12-31	1417
1993-03-31	1527
1993-06-30	1390
1993-09-30	1752
1993-12-31	1605
1994-03-31	1632
1994-06-30	1452
1994-09-30	1666
1994-12-31	1806
1995-03-31	1752
1995-06-30	2401
1995-09-30	2188
1995-12-31	2032
1996-03-31	2136
1996-06-30	2080
1996-09-30	2334
1996-12-31	3099
1997-03-31	2678
1997-06-30	2238
1997-09-30	1557
1997-12-31	1925
1998-03-31	1220
1998-06-30	1129
1998-09-30	1273
1998-12-31	1299
1999-03-31	1229
1999-06-30	1602
1999-09-30	1381
1999-12-31	1695
2000-03-31	1639
2000-06-30	2216
2000-09-30	2050
2000-12-31	2094
2001-03-31	2892
2001-06-30	3371
2001-09-30	3051
2001-12-31	2770
2002-03-31	2854
2002-06-30	2741
2002-09-30	2880
2002-12-31	2630
2003-03-31	2531
2003-06-30	2976
2003-09-30	3072
2003-12-31	2970
2004-03-31	2777
2004-06-30	2466
2004-09-30	2675
2004-12-31	2235
2005-03-31	2625
2005-06-30	2633
2005-09-30	2993
2005-12-31	2792
2006-03-31	3165
2006-06-30	2568
2006-09-30	2438
2006-12-31	2627
2007-03-31	2448
2007-06-30	2277
2007-09-30	1916
2007-12-31	1915
2008-03-31	1857
2008-06-30	1383
2008-09-30	751
2008-12-31	1525
2009-03-31	1186
2009-06-30	1538
2009-09-30	1544
2009-12-31	1586
2010-03-31	2393
2010-06-30	1873
2010-09-30	1289
2010-12-31	1630
2011-03-31	1173
2011-06-30	801
2011-09-30	690
2011-12-31	708
2012-03-31	940
2012-06-30	1017
2012-09-30	1006
2012-12-31	1030
2013-03-31	1214
2013-06-30	421
2013-09-30	632
2013-12-31	790
2014-03-31	849
2014-06-30	1000
2014-09-30	1217
2014-12-31	483
2015-03-31	531
2015-06-30	577
2015-09-30	642
2015-12-31	719
2016-03-31	563
2016-06-30	1238
2016-09-30	1201
2016-12-31	1383
2017-03-31	1049
2017-06-30	1115
2017-09-30	973
2017-12-31	1394
2018-03-31	1401
2018-06-30	1216
2018-09-30	1292
2018-12-31	706
2019-03-31	756
2019-06-30	1198
2019-09-30	648
2019-12-31	1521
2020-03-31	2056
2020-06-30	1765
2020-09-30	1909
2020-12-31	1722
2021-03-31	3080
2021-06-30	2447
2021-09-30	2816
2021-12-31	1883
2022-03-31	3152
2022-06-30	2981
2022-09-30	3430
2022-12-31	3304
2023-03-31	2361
2023-06-30	3621
2023-09-30	3435