Quarter	US dollars
1999-03-31	121
1999-06-30	210
1999-09-30	156
1999-12-31	168
2000-03-31	208
2000-06-30	238
2000-09-30	267
2000-12-31	211
2001-03-31	160
2001-06-30	122
2001-09-30	178
2001-12-31	50
2002-03-31	24
2002-06-30	188
2002-09-30	157
2002-12-31	174
2003-03-31	250
2003-06-30	48
2003-09-30	174
2003-12-31	132
2004-03-31	229
2004-06-30	151
2004-09-30	166
2004-12-31	364
2005-03-31	135
2005-06-30	203
2005-09-30	267
2005-12-31	215
2006-03-31	326
2006-06-30	242
2006-09-30	400
2006-12-31	507
2007-03-31	353
2007-06-30	566
2007-09-30	402
2007-12-31	534
2008-03-31	276
2008-06-30	54
2008-09-30	181
2008-12-31	97
2009-03-31	22
2009-06-30	35
2009-09-30	15
2009-12-31	42
2010-03-31	95
2010-06-30	10
2010-09-30	26
2010-12-31	15
2011-03-31	55
2011-06-30	155
2011-09-30	972
2011-12-31	22
2012-03-31	568
2012-06-30	527
2012-09-30	41
2012-12-31	21
2013-03-31	29
2013-06-30	299
2013-09-30	418
2013-12-31	58
2014-03-31	33
2014-06-30	17
2014-09-30	21
2014-12-31	43
2015-03-31	21
2015-06-30	26
2015-09-30	27
2015-12-31	24
2016-03-31	27
2016-06-30	28
2016-09-30	33
2016-12-31	34
2017-03-31	31
2017-06-30	36
2017-09-30	48
2017-12-31	22
2018-03-31	51
2018-06-30	60
2018-09-30	25
2018-12-31	25
2019-03-31	13
2019-06-30	22
2019-09-30	29
2019-12-31	3
2020-03-31	36
2020-06-30	39
2020-09-30	42
2020-12-31	51
2021-03-31	57
2021-06-30	60
2021-09-30	64
2021-12-31	6
2022-03-31	36
2022-06-30	41
2022-09-30	42
2022-12-31	5
2023-03-31	6
2023-06-30	12
2023-09-30	7