Quarter	US dollars
1999-09-30	397
1999-12-31	164
2000-03-31	124
2000-06-30	213
2000-09-30	367
2000-12-31	438
2001-03-31	859
2001-06-30	309
2001-09-30	218
2001-12-31	245
2002-03-31	244
2002-06-30	383
2002-09-30	324
2002-12-31	241
2003-03-31	223
2003-06-30	272
2003-09-30	445
2003-12-31	410
2004-03-31	371
2004-06-30	375
2004-09-30	375
2004-12-31	443
2005-03-31	401
2005-06-30	493
2005-09-30	506
2005-12-31	527
2006-03-31	716
2006-06-30	703
2006-09-30	831
2006-12-31	493
2007-03-31	1265
2007-06-30	1270
2007-09-30	1147
2007-12-31	984
2008-03-31	2721
2008-06-30	2062
2008-09-30	1550
2008-12-31	2444
2009-03-31	1889
2009-06-30	1624
2009-09-30	1946
2009-12-31	1928
2010-03-31	1853
2010-06-30	2047
2010-09-30	3148
2010-12-31	2639
2011-03-31	2167
2011-06-30	2373
2011-09-30	1617
2011-12-31	1739
2012-03-31	1419
2012-06-30	1362
2012-09-30	1297
2012-12-31	863
2013-03-31	1640
2013-06-30	1608
2013-09-30	1461
2013-12-31	1973
2014-03-31	1295
2014-06-30	1079
2014-09-30	1115
2014-12-31	1313
2015-03-31	1209
2015-06-30	1449
2015-09-30	2107
2015-12-31	1430
2016-03-31	1270
2016-06-30	1135
2016-09-30	978
2016-12-31	898
2017-03-31	820
2017-06-30	757
2017-09-30	723
2017-12-31	757
2018-03-31	900
2018-06-30	804
2018-09-30	649
2018-12-31	635
2019-03-31	687
2019-06-30	1013
2019-09-30	1077
2019-12-31	1091
2020-03-31	1466
2020-06-30	1348
2020-09-30	1317
2020-12-31	1306
2021-03-31	1159
2021-06-30	978
2021-09-30	1628
2021-12-31	1011
2022-03-31	736
2022-06-30	956
2022-09-30	1400
2022-12-31	842
2023-03-31	570
2023-06-30	702
2023-09-30	981