Quarter	US dollars
1999-03-31	148
1999-06-30	142
1999-09-30	120
1999-12-31	112
2000-03-31	104
2000-06-30	82
2000-09-30	93
2000-12-31	91
2001-03-31	81
2001-06-30	84
2001-09-30	94
2001-12-31	107
2002-03-31	85
2002-06-30	108
2002-09-30	97
2002-12-31	113
2003-03-31	133
2003-06-30	124
2003-09-30	102
2003-12-31	139
2004-03-31	125
2004-06-30	118
2004-09-30	131
2004-12-31	106
2005-03-31	102
2005-06-30	114
2005-09-30	137
2005-12-31	228
2006-03-31	79
2006-06-30	95
2006-09-30	84
2006-12-31	90
2007-03-31	95
2007-06-30	113
2007-09-30	143
2007-12-31	116
2008-03-31	283
2008-06-30	613
2008-09-30	1343
2008-12-31	491
2009-03-31	454
2009-06-30	521
2009-09-30	534
2009-12-31	504
2010-03-31	445
2010-06-30	473
2010-09-30	508
2010-12-31	532
2011-03-31	496
2011-06-30	485
2011-09-30	159
2011-12-31	163
2012-03-31	205
2012-06-30	208
2012-09-30	141
2012-12-31	127
2013-03-31	136
2013-06-30	130
2013-09-30	93
2013-12-31	121
2014-03-31	85
2014-06-30	98
2014-09-30	72
2014-12-31	88
2015-03-31	80
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	28
2017-09-30	32
2017-12-31	66
2018-03-31	54
2018-06-30	63
2018-09-30	85
2018-12-31	36
2019-03-31	29
2019-06-30	25
2019-09-30	20
2019-12-31	32
2020-03-31	18
2020-06-30	34
2020-09-30	24
2020-12-31	32
2021-03-31	32
2021-06-30	45
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