Quarter	US dollars
1999-03-31	19
1999-06-30	18
1999-09-30	17
1999-12-31	15
2000-03-31	15
2000-06-30	15
2000-09-30	14
2000-12-31	14
2001-03-31	15
2001-06-30	51
2001-09-30	21
2001-12-31	18
2002-03-31	41
2002-06-30	51
2002-09-30	36
2002-12-31	74
2003-03-31	34
2003-06-30	53
2003-09-30	29
2003-12-31	54
2004-03-31	112
2004-06-30	174
2004-09-30	360
2004-12-31	120
2005-03-31	219
2005-06-30	119
2005-09-30	207
2005-12-31	98
2006-03-31	176
2006-06-30	90
2006-09-30	185
2006-12-31	83
2007-03-31	162
2007-06-30	113
2007-09-30	159
2007-12-31	72
2008-03-31	142
2008-06-30	70
2008-09-30	147
2008-12-31	63
2009-03-31	130
2009-06-30	58
2009-09-30	119
2009-12-31	160
2010-03-31	124
2010-06-30	72
2010-09-30	51
2010-12-31	179
2011-03-31	140
2011-06-30	153
2011-09-30	355
2011-12-31	360
2012-03-31	132
2012-06-30	155
2012-09-30	105
2012-12-31	89
2013-03-31	86
2013-06-30	94
2013-09-30	86
2013-12-31	86
2014-03-31	102
2014-06-30	93
2014-09-30	67
2014-12-31	74
2015-03-31	88
2015-06-30	82
2015-09-30	77
2015-12-31	75
2016-03-31	81
2016-06-30	70
2016-09-30	71
2016-12-31	64
2017-03-31	70
2017-06-30	70
2017-09-30	51
2017-12-31	65
2018-03-31	133
2018-06-30	79
2018-09-30	57
2018-12-31	121
2019-03-31	81
2019-06-30	148
2019-09-30	163
2019-12-31	142
2020-03-31	110
2020-06-30	97
2020-09-30	133
2020-12-31	66
2021-03-31	89
2021-06-30	102
2021-09-30	53
2021-12-31	44
2022-03-31	42
2022-06-30	224
2022-09-30	136
2022-12-31	184
2023-03-31	213
2023-06-30	151
2023-09-30	126