Quarter	US dollars
2004-12-31	0
2005-03-31	9
2005-06-30	27
2005-09-30	48
2005-12-31	74
2006-03-31	62
2006-06-30	55
2006-09-30	9
2006-12-31	20
2007-03-31	10
2007-06-30	10
2007-09-30	47
2007-12-31	88
2008-03-31	99
2008-06-30	117
2008-09-30	100
2008-12-31	102
2009-03-31	126
2009-06-30	120
2009-09-30	171
2009-12-31	142
2010-03-31	147
2010-06-30	99
2010-09-30	117
2010-12-31	105
2011-03-31	143
2011-06-30	145
2011-09-30	136
2011-12-31	113
2012-03-31	121
2012-06-30	141
2012-09-30	144
2012-12-31	146
2013-03-31	123
2013-06-30	153
2013-09-30	160
2013-12-31	177
2014-03-31	175
2014-06-30	164
2014-09-30	175
2014-12-31	194
2015-03-31	160
2015-06-30	173
2015-09-30	232
2015-12-31	246
2016-03-31	221
2016-06-30	165
2016-09-30	174
2016-12-31	162
2017-03-31	154
2017-06-30	205
2017-09-30	184
2017-12-31	159
2018-03-31	101
2018-06-30	143
2018-09-30	133
2018-12-31	-144
2019-03-31	-139
2019-06-30	-197
2019-09-30	-198
2019-12-31	-210
2020-03-31	-202
2020-06-30	-183
2020-09-30	-191
2020-12-31	-130
2021-03-31	-134
2021-06-30	-112
2021-09-30	-131
2021-12-31	-123
2022-03-31	93
2022-06-30	114
2022-09-30	114
2022-12-31	137
2023-03-31	87
2023-06-30	56
2023-09-30	55