Quarter	US dollars
2004-12-31	0
2005-03-31	0
2005-06-30	0
2005-09-30	0
2005-12-31	0
2006-03-31	0
2006-06-30	0
2006-09-30	0
2006-12-31	0
2007-03-31	0
2007-06-30	2
2007-09-30	98
2007-12-31	135
2008-03-31	80
2008-06-30	70
2008-09-30	59
2008-12-31	33
2009-03-31	0
2009-06-30	31
2009-09-30	32
2009-12-31	31
2010-03-31	32
2010-06-30	236
2010-09-30	241
2010-12-31	519
2011-03-31	380
2011-06-30	516
2011-09-30	1580
2011-12-31	1521
2012-03-31	2864
2012-06-30	2823
2012-09-30	2550
2012-12-31	2923
2013-03-31	3625
2013-06-30	3261
2013-09-30	2709
2013-12-31	2311
2014-03-31	2114
2014-06-30	2055
2014-09-30	2108
2014-12-31	1737
2015-03-31	1603
2015-06-30	1578
2015-09-30	1522
2015-12-31	1406
2016-03-31	1288
2016-06-30	1245
2016-09-30	1208
2016-12-31	1075
2017-03-31	1037
2017-06-30	929
2017-09-30	617
2017-12-31	512
2018-03-31	457
2018-06-30	415
2018-09-30	462
2018-12-31	308
2019-03-31	300
2019-06-30	284
2019-09-30	282
2019-12-31	137
2020-03-31	156
2020-06-30	163
2020-09-30	190
2020-12-31	199
2021-03-31	233
2021-06-30	211
2021-09-30	222
2021-12-31	179
2022-03-31	283
2022-06-30	255
2022-09-30	251
2022-12-31	227
2023-03-31	224
2023-06-30	219
2023-09-30	270