Quarter	US dollars
1986-09-30	679
1986-12-31	623
1987-03-31	713
1987-06-30	567
1987-09-30	539
1987-12-31	596
1988-03-31	552
1988-06-30	663
1988-09-30	575
1988-12-31	593
1989-03-31	550
1989-06-30	555
1989-09-30	545
1989-12-31	635
1990-03-31	623
1990-06-30	650
1990-09-30	794
1990-12-31	783
1991-03-31	924
1991-06-30	963
1991-09-30	1198
1991-12-31	1104
1992-03-31	1094
1992-06-30	1145
1992-09-30	1175
1992-12-31	1313
1993-03-31	1513
1993-06-30	1421
1993-09-30	1449
1993-12-31	1647
1994-03-31	2442
1994-06-30	2462
1994-09-30	2821
1994-12-31	2580
1995-03-31	2871
1995-06-30	3779
1995-09-30	3825
1995-12-31	3541
1996-03-31	3289
1996-06-30	4862
1996-09-30	4926
1996-12-31	5219
1997-03-31	5018
1997-06-30	4868
1997-09-30	4152
1997-12-31	3997
1998-03-31	3152
1998-06-30	2745
1998-09-30	2413
1998-12-31	2345
1999-03-31	2030
1999-06-30	1859
1999-09-30	1739
1999-12-31	1695
2000-03-31	1592
2000-06-30	1861
2000-09-30	3250
2000-12-31	1478
2001-03-31	1572
2001-06-30	1377
2001-09-30	1234
2001-12-31	1148
2002-03-31	1462
2002-06-30	2439
2002-09-30	1340
2002-12-31	1500
2003-03-31	1372
2003-06-30	1514
2003-09-30	1012
2003-12-31	1626
2004-03-31	1178
2004-06-30	1108
2004-09-30	2524
2004-12-31	2267
2005-03-31	938
2005-06-30	1126
2005-09-30	1312
2005-12-31	936
2006-03-31	812
2006-06-30	990
2006-09-30	1142
2006-12-31	1476
2007-03-31	1531
2007-06-30	897
2007-09-30	974
2007-12-31	867
2008-03-31	1461
2008-06-30	913
2008-09-30	917
2008-12-31	1069
2009-03-31	1110
2009-06-30	1228
2009-09-30	1266
2009-12-31	1143
2010-03-31	1400
2010-06-30	2145
2010-09-30	2427
2010-12-31	3407
2011-03-31	3243
2011-06-30	1826
2011-09-30	2780
2011-12-31	2025
2012-03-31	2644
2012-06-30	2342
2012-09-30	2211
2012-12-31	2628
2013-03-31	3242
2013-06-30	3457
2013-09-30	2498
2013-12-31	2385
2014-03-31	2824
2014-06-30	2695
2014-09-30	2295
2014-12-31	2191
2015-03-31	1941
2015-06-30	2369
2015-09-30	2690
2015-12-31	2834
2016-03-31	2879
2016-06-30	3424
2016-09-30	3138
2016-12-31	3059
2017-03-31	2817
2017-06-30	3390
2017-09-30	3848
2017-12-31	3983
2018-03-31	3178
2018-06-30	2970
2018-09-30	2191
2018-12-31	1751
2019-03-31	1732
2019-06-30	1819
2019-09-30	1531
2019-12-31	1535
2020-03-31	1749
2020-06-30	1778
2020-09-30	1699
2020-12-31	2549
2021-03-31	1524
2021-06-30	1385
2021-09-30	1578
2021-12-31	1610
2022-03-31	1594
2022-06-30	1792
2022-09-30	2090
2022-12-31	1786
2023-03-31	1873
2023-06-30	2418
2023-09-30	2540