Quarter	US dollars
1999-09-30	794
1999-12-31	845
2000-03-31	814
2000-06-30	966
2000-09-30	982
2000-12-31	1005
2001-03-31	1130
2001-06-30	985
2001-09-30	1110
2001-12-31	1341
2002-03-31	1131
2002-06-30	1570
2002-09-30	1879
2002-12-31	2142
2003-03-31	2483
2003-06-30	3446
2003-09-30	3231
2003-12-31	3807
2004-03-31	3845
2004-06-30	3319
2004-09-30	4082
2004-12-31	5583
2005-03-31	4522
2005-06-30	5324
2005-09-30	4942
2005-12-31	4190
2006-03-31	4773
2006-06-30	5850
2006-09-30	4764
2006-12-31	6303
2007-03-31	8640
2007-06-30	10825
2007-09-30	10230
2007-12-31	12945
2008-03-31	17357
2008-06-30	19483
2008-09-30	13412
2008-12-31	26617
2009-03-31	22965
2009-06-30	20239
2009-09-30	21395
2009-12-31	18439
2010-03-31	18642
2010-06-30	19322
2010-09-30	22906
2010-12-31	17801
2011-03-31	16706
2011-06-30	16795
2011-09-30	20494
2011-12-31	19841
2012-03-31	19072
2012-06-30	19807
2012-09-30	14303
2012-12-31	14205
2013-03-31	12703
2013-06-30	11210
2013-09-30	10520
2013-12-31	10201
2014-03-31	13975
2014-06-30	15115
2014-09-30	15803
2014-12-31	16864
2015-03-31	17767
2015-06-30	13661
2015-09-30	10635
2015-12-31	9866
2016-03-31	12857
2016-06-30	13553
2016-09-30	12687
2016-12-31	10024
2017-03-31	9418
2017-06-30	9192
2017-09-30	9423
2017-12-31	8925
2018-03-31	8803
2018-06-30	6028
2018-09-30	6248
2018-12-31	8707
2019-03-31	9809
2019-06-30	10695
2019-09-30	12398
2019-12-31	10059
2020-03-31	12363
2020-06-30	11730
2020-09-30	11488
2020-12-31	12456
2021-03-31	10675
2021-06-30	10015
2021-09-30	8724
2021-12-31	8833
2022-03-31	8013
2022-06-30	7217
2022-09-30	7720
2022-12-31	7202
2023-03-31	7039
2023-06-30	7270
2023-09-30	6677