Quarter	US dollars
1986-09-30	279
1986-12-31	318
1987-03-31	220
1987-06-30	348
1987-09-30	442
1987-12-31	308
1988-03-31	333
1988-06-30	397
1988-09-30	180
1988-12-31	212
1989-03-31	298
1989-06-30	378
1989-09-30	523
1989-12-31	622
1990-03-31	543
1990-06-30	703
1990-09-30	1145
1990-12-31	1510
1991-03-31	1179
1991-06-30	942
1991-09-30	906
1991-12-31	719
1992-03-31	709
1992-06-30	692
1992-09-30	1059
1992-12-31	1228
1993-03-31	1123
1993-06-30	1282
1993-09-30	1362
1993-12-31	2169
1994-03-31	1963
1994-06-30	1844
1994-09-30	1821
1994-12-31	2602
1995-03-31	2935
1995-06-30	2917
1995-09-30	2837
1995-12-31	3028
1996-03-31	3061
1996-06-30	2822
1996-09-30	2812
1996-12-31	2798
1997-03-31	2652
1997-06-30	2296
1997-09-30	2551
1997-12-31	2944
1998-03-31	2877
1998-06-30	2279
1998-09-30	1988
1998-12-31	1853
1999-03-31	1123
1999-06-30	746
1999-09-30	399
1999-12-31	227
2000-03-31	246
2000-06-30	261
2000-09-30	305
2000-12-31	377
2001-03-31	699
2001-06-30	913
2001-09-30	937
2001-12-31	989
2002-03-31	985
2002-06-30	600
2002-09-30	702
2002-12-31	931
2003-03-31	943
2003-06-30	941
2003-09-30	841
2003-12-31	996
2004-03-31	1047
2004-06-30	780
2004-09-30	878
2004-12-31	847
2005-03-31	893
2005-06-30	1214
2005-09-30	1283
2005-12-31	883
2006-03-31	1602
2006-06-30	2195
2006-09-30	1703
2006-12-31	2719
2007-03-31	2166
2007-06-30	3123
2007-09-30	3406
2007-12-31	3822
2008-03-31	3918
2008-06-30	4253
2008-09-30	3933
2008-12-31	2345
2009-03-31	3285
2009-06-30	3225
2009-09-30	3770
2009-12-31	3793
2010-03-31	3731
2010-06-30	3738
2010-09-30	3980
2010-12-31	3963
2011-03-31	3200
2011-06-30	2793
2011-09-30	1921
2011-12-31	1881
2012-03-31	2122
2012-06-30	1420
2012-09-30	1588
2012-12-31	2212
2013-03-31	2012
2013-06-30	2243
2013-09-30	2652
2013-12-31	2332
2014-03-31	1427
2014-06-30	1864
2014-09-30	2464
2014-12-31	4224
2015-03-31	2943
2015-06-30	2909
2015-09-30	3675
2015-12-31	3934
2016-03-31	2975
2016-06-30	3457
2016-09-30	2676
2016-12-31	2661
2017-03-31	1822
2017-06-30	2497
2017-09-30	1741
2017-12-31	1372
2018-03-31	1680
2018-06-30	1491
2018-09-30	1391
2018-12-31	1782
2019-03-31	1529
2019-06-30	1665
2019-09-30	1890
2019-12-31	2209
2020-03-31	1780
2020-06-30	1726
2020-09-30	1762
2020-12-31	1530
2021-03-31	1170
2021-06-30	927
2021-09-30	1000
2021-12-31	833
2022-03-31	1431
2022-06-30	2056
2022-09-30	2171
2022-12-31	1070
2023-03-31	887
2023-06-30	971
2023-09-30	758