Quarter	US dollars
1999-03-31	109
1999-06-30	62
1999-09-30	67
1999-12-31	50
2000-03-31	90
2000-06-30	124
2000-09-30	143
2000-12-31	220
2001-03-31	301
2001-06-30	149
2001-09-30	183
2001-12-31	102
2002-03-31	244
2002-06-30	248
2002-09-30	300
2002-12-31	165
2003-03-31	112
2003-06-30	50
2003-09-30	56
2003-12-31	35
2004-03-31	18
2004-06-30	31
2004-09-30	26
2004-12-31	24
2005-03-31	45
2005-06-30	15
2005-09-30	32
2005-12-31	42
2006-03-31	47
2006-06-30	67
2006-09-30	48
2006-12-31	119
2007-03-31	148
2007-06-30	98
2007-09-30	117
2007-12-31	203
2008-03-31	128
2008-06-30	169
2008-09-30	169
2008-12-31	112
2009-03-31	115
2009-06-30	108
2009-09-30	124
2009-12-31	121
2010-03-31	101
2010-06-30	99
2010-09-30	92
2010-12-31	89
2011-03-31	82
2011-06-30	88
2011-09-30	76
2011-12-31	39
2012-03-31	30
2012-06-30	17
2012-09-30	17
2012-12-31	17
2013-03-31	25
2013-06-30	99
2013-09-30	31
2013-12-31	27
2014-03-31	48
2014-06-30	16
2014-09-30	10
2014-12-31	8
2015-03-31	126
2015-06-30	2091
2015-09-30	2104
2015-12-31	2100
2016-03-31	2219
2016-06-30	2213
2016-09-30	2224
2016-12-31	2230
2017-03-31	2203
2017-06-30	2214
2017-09-30	2085
2017-12-31	2137
2018-03-31	2080
2018-06-30	1600
2018-09-30	1598
2018-12-31	1602
2019-03-31	483
2019-06-30	4
2019-09-30	-4
2019-12-31	2
2020-03-31	0
2020-06-30	0
2020-09-30	0
2020-12-31	0
2021-03-31	0
2021-06-30	0
2021-09-30	0
2021-12-31	-7
2022-03-31	11
2022-06-30	15
2022-09-30	8
2022-12-31	1
2023-03-31	0
2023-06-30	0
2023-09-30	0