Quarter	US dollars
1999-09-30	35312
1999-12-31	41824
2000-03-31	35194
2000-06-30	40727
2000-09-30	42601
2000-12-31	48179
2001-03-31	43307
2001-06-30	43082
2001-09-30	43605
2001-12-31	40444
2002-03-31	39964
2002-06-30	43700
2002-09-30	43985
2002-12-31	42805
2003-03-31	41708
2003-06-30	41582
2003-09-30	44781
2003-12-31	46060
2004-03-31	46436
2004-06-30	45666
2004-09-30	45926
2004-12-31	49740
2005-03-31	48774
2005-06-30	48118
2005-09-30	47277
2005-12-31	48096
2006-03-31	48735
2006-06-30	48851
2006-09-30	51443
2006-12-31	53214
2007-03-31	52923
2007-06-30	52825
2007-09-30	52735
2007-12-31	57178
2008-03-31	59374
2008-06-30	59033
2008-09-30	52021
2008-12-31	48974
2009-03-31	45435
2009-06-30	50911
2009-09-30	63252
2009-12-31	64138
2010-03-31	69091
2010-06-30	71114
2010-09-30	77590
2010-12-31	77869
2011-03-31	85729
2011-06-30	90783
2011-09-30	94342
2011-12-31	93540
2012-03-31	98672
2012-06-30	101174
2012-09-30	105084
2012-12-31	105166
2013-03-31	103830
2013-06-30	102054
2013-09-30	108354
2013-12-31	108804
2014-03-31	115351
2014-06-30	115964
2014-09-30	111461
2014-12-31	109088
2015-03-31	124617
2015-06-30	127289
2015-09-30	131039
2015-12-31	130486
2016-03-31	138018
2016-06-30	143467
2016-09-30	146730
2016-12-31	136586
2017-03-31	143492
2017-06-30	150766
2017-09-30	154315
2017-12-31	158550
2018-03-31	164210
2018-06-30	162730
2018-09-30	161256
2018-12-31	176577
2019-03-31	169493
2019-06-30	168206
2019-09-30	162876
2019-12-31	182716
2020-03-31	175122
2020-06-30	177643
2020-09-30	173644
2020-12-31	186656
2021-03-31	178148
2021-06-30	176594
2021-09-30	202169
2021-12-31	203709
2022-03-31	200329
2022-06-30	185230
2022-09-30	171551
2022-12-31	185565
2023-03-31	186090
2023-06-30	184504
2023-09-30	181587
2023-12-31	190490