Quarter	US dollars
1999-09-30	56
1999-12-31	52
2000-03-31	53
2000-06-30	44
2000-09-30	41
2000-12-31	43
2001-03-31	40
2001-06-30	49
2001-09-30	49
2001-12-31	47
2002-03-31	54
2002-06-30	55
2002-09-30	99
2002-12-31	105
2003-03-31	103
2003-06-30	102
2003-09-30	128
2003-12-31	116
2004-03-31	123
2004-06-30	103
2004-09-30	112
2004-12-31	136
2005-03-31	147
2005-06-30	145
2005-09-30	161
2005-12-31	160
2006-03-31	160
2006-06-30	203
2006-09-30	243
2006-12-31	250
2007-03-31	280
2007-06-30	315
2007-09-30	334
2007-12-31	366
2008-03-31	547
2008-06-30	545
2008-09-30	513
2008-12-31	394
2009-03-31	393
2009-06-30	430
2009-09-30	473
2009-12-31	444
2010-03-31	411
2010-06-30	368
2010-09-30	381
2010-12-31	405
2011-03-31	390
2011-06-30	434
2011-09-30	421
2011-12-31	387
2012-03-31	446
2012-06-30	435
2012-09-30	497
2012-12-31	540
2013-03-31	493
2013-06-30	538
2013-09-30	619
2013-12-31	527
2014-03-31	507
2014-06-30	523
2014-09-30	486
2014-12-31	465
2015-03-31	425
2015-06-30	525
2015-09-30	383
2015-12-31	348
2016-03-31	296
2016-06-30	305
2016-09-30	316
2016-12-31	301
2017-03-31	301
2017-06-30	64
2017-09-30	70
2017-12-31	54
2018-03-31	39
2018-06-30	26
2018-09-30	130
2018-12-31	134
2019-03-31	202
2019-06-30	177
2019-09-30	216
2019-12-31	244
2020-03-31	217
2020-06-30	105
2020-09-30	100
2020-12-31	97
2021-03-31	121
2021-06-30	140
2021-09-30	142
2021-12-31	132
2022-03-31	96
2022-06-30	79
2022-09-30	78
2022-12-31	55
2023-03-31	57
2023-06-30	61
2023-09-30	72