Quarter	US dollars
1999-03-31	153
1999-06-30	149
1999-09-30	125
1999-12-31	121
2000-03-31	127
2000-06-30	116
2000-09-30	119
2000-12-31	110
2001-03-31	101
2001-06-30	101
2001-09-30	110
2001-12-31	123
2002-03-31	103
2002-06-30	127
2002-09-30	113
2002-12-31	134
2003-03-31	151
2003-06-30	140
2003-09-30	113
2003-12-31	146
2004-03-31	135
2004-06-30	128
2004-09-30	140
2004-12-31	113
2005-03-31	109
2005-06-30	120
2005-09-30	140
2005-12-31	230
2006-03-31	80
2006-06-30	97
2006-09-30	87
2006-12-31	93
2007-03-31	99
2007-06-30	116
2007-09-30	148
2007-12-31	126
2008-03-31	285
2008-06-30	621
2008-09-30	1348
2008-12-31	493
2009-03-31	457
2009-06-30	531
2009-09-30	556
2009-12-31	511
2010-03-31	450
2010-06-30	485
2010-09-30	521
2010-12-31	548
2011-03-31	509
2011-06-30	500
2011-09-30	175
2011-12-31	183
2012-03-31	219
2012-06-30	215
2012-09-30	149
2012-12-31	136
2013-03-31	139
2013-06-30	136
2013-09-30	102
2013-12-31	124
2014-03-31	91
2014-06-30	101
2014-09-30	83
2014-12-31	96
2015-03-31	81
2015-06-30	98
2015-09-30	76
2015-12-31	93
2016-03-31	102
2016-06-30	97
2016-09-30	70
2016-12-31	49
2017-03-31	36
2017-06-30	29
2017-09-30	32
2017-12-31	67
2018-03-31	55
2018-06-30	67
2018-09-30	94
2018-12-31	45
2019-03-31	45
2019-06-30	38
2019-09-30	32
2019-12-31	45
2020-03-31	31
2020-06-30	44
2020-09-30	29
2020-12-31	33
2021-03-31	33
2021-06-30	46
2021-09-30	49
2021-12-31	64
2022-03-31	58
2022-06-30	96
2022-09-30	65
2022-12-31	25
2023-03-31	60
2023-06-30	63
2023-09-30	62