Quarter	US dollars
1999-03-31	37
1999-06-30	28
1999-09-30	33
1999-12-31	39
2000-03-31	31
2000-06-30	30
2000-09-30	34
2000-12-31	30
2001-03-31	39
2001-06-30	33
2001-09-30	43
2001-12-31	27
2002-03-31	26
2002-06-30	96
2002-09-30	33
2002-12-31	51
2003-03-31	38
2003-06-30	31
2003-09-30	48
2003-12-31	67
2004-03-31	43
2004-06-30	35
2004-09-30	59
2004-12-31	60
2005-03-31	52
2005-06-30	63
2005-09-30	64
2005-12-31	81
2006-03-31	75
2006-06-30	95
2006-09-30	103
2006-12-31	100
2007-03-31	100
2007-06-30	97
2007-09-30	105
2007-12-31	223
2008-03-31	589
2008-06-30	178
2008-09-30	968
2008-12-31	156
2009-03-31	176
2009-06-30	451
2009-09-30	791
2009-12-31	298
2010-03-31	294
2010-06-30	170
2010-09-30	188
2010-12-31	190
2011-03-31	207
2011-06-30	168
2011-09-30	17
2011-12-31	180
2012-03-31	200
2012-06-30	166
2012-09-30	193
2012-12-31	175
2013-03-31	185
2013-06-30	130
2013-09-30	138
2013-12-31	182
2014-03-31	160
2014-06-30	154
2014-09-30	239
2014-12-31	91
2015-03-31	232
2015-06-30	245
2015-09-30	241
2015-12-31	166
2016-03-31	268
2016-06-30	283
2016-09-30	271
2016-12-31	265
2017-03-31	291
2017-06-30	276
2017-09-30	266
2017-12-31	323
2018-03-31	333
2018-06-30	324
2018-09-30	274
2018-12-31	221
2019-03-31	43
2019-06-30	158
2019-09-30	11
2019-12-31	24
2020-03-31	16
2020-06-30	191
2020-09-30	201
2020-12-31	239
2021-03-31	190
2021-06-30	192
2021-09-30	189
2021-12-31	196
2022-03-31	198
2022-06-30	191
2022-09-30	222
2022-12-31	1095
2023-03-31	1166
2023-06-30	1592
2023-09-30	1497