Quarter	US dollars
1999-09-30	49661
1999-12-31	57558
2000-03-31	55330
2000-06-30	61018
2000-09-30	62634
2000-12-31	47241
2001-03-31	43922
2001-06-30	45770
2001-09-30	46885
2001-12-31	42387
2002-03-31	51303
2002-06-30	50592
2002-09-30	47929
2002-12-31	45722
2003-03-31	53447
2003-06-30	49723
2003-09-30	53115
2003-12-31	48902
2004-03-31	59254
2004-06-30	51660
2004-09-30	49420
2004-12-31	54293
2005-03-31	57202
2005-06-30	62298
2005-09-30	56697
2005-12-31	62529
2006-03-31	65939
2006-06-30	83998
2006-09-30	67050
2006-12-31	82944
2007-03-31	85742
2007-06-30	81697
2007-09-30	95562
2007-12-31	116701
2008-03-31	132322
2008-06-30	111181
2008-09-30	116435
2008-12-31	107538
2009-03-31	85288
2009-06-30	97515
2009-09-30	112140
2009-12-31	118203
2010-03-31	111443
2010-06-30	129291
2010-09-30	147167
2010-12-31	137401
2011-03-31	119792
2011-06-30	119614
2011-09-30	127137
2011-12-31	127920
2012-03-31	132473
2012-06-30	142120
2012-09-30	128620
2012-12-31	112625
2013-03-31	81932
2013-06-30	81925
2013-09-30	98492
2013-12-31	91730
2014-03-31	100276
2014-06-30	105723
2014-09-30	100510
2014-12-31	90701
2015-03-31	106686
2015-06-30	98412
2015-09-30	106888
2015-12-31	98754
2016-03-31	113828
2016-06-30	127324
2016-09-30	136330
2016-12-31	141040
2017-03-31	137204
2017-06-30	139203
2017-09-30	154056
2017-12-31	153892
2018-03-31	168956
2018-06-30	151846
2018-09-30	168949
2018-12-31	168299
2019-03-31	169528
2019-06-30	177367
2019-09-30	158951
2019-12-31	171886
2020-03-31	196079
2020-06-30	185358
2020-09-30	197255
2020-12-31	188175
2021-03-31	184429
2021-06-30	183298
2021-09-30	193156
2021-12-31	183561
2022-03-31	163200
2022-06-30	188972
2022-09-30	192085
2022-12-31	201821
2023-03-31	200289
2023-06-30	209287
2023-09-30	213718