Quarter	US dollars
1999-09-30	13
1999-12-31	21
2000-03-31	18
2000-06-30	8
2000-09-30	12
2000-12-31	16
2001-03-31	24
2001-06-30	18
2001-09-30	10
2001-12-31	13
2002-03-31	6
2002-06-30	26
2002-09-30	22
2002-12-31	29
2003-03-31	38
2003-06-30	50
2003-09-30	37
2003-12-31	45
2004-03-31	42
2004-06-30	29
2004-09-30	25
2004-12-31	38
2005-03-31	51
2005-06-30	41
2005-09-30	42
2005-12-31	38
2006-03-31	24
2006-06-30	37
2006-09-30	34
2006-12-31	14
2007-03-31	24
2007-06-30	52
2007-09-30	104
2007-12-31	155
2008-03-31	360
2008-06-30	125
2008-09-30	73
2008-12-31	174
2009-03-31	103
2009-06-30	71
2009-09-30	75
2009-12-31	81
2010-03-31	106
2010-06-30	96
2010-09-30	87
2010-12-31	95
2011-03-31	130
2011-06-30	185
2011-09-30	248
2011-12-31	223
2012-03-31	110
2012-06-30	93
2012-09-30	297
2012-12-31	184
2013-03-31	232
2013-06-30	129
2013-09-30	96
2013-12-31	63
2014-03-31	80
2014-06-30	39
2014-09-30	148
2014-12-31	162
2015-03-31	279
2015-06-30	64
2015-09-30	95
2015-12-31	31
2016-03-31	46
2016-06-30	54
2016-09-30	36
2016-12-31	43
2017-03-31	23
2017-06-30	29
2017-09-30	82
2017-12-31	31
2018-03-31	66
2018-06-30	21
2018-09-30	55
2018-12-31	61
2019-03-31	64
2019-06-30	104
2019-09-30	128
2019-12-31	111
2020-03-31	244
2020-06-30	172
2020-09-30	164
2020-12-31	384
2021-03-31	255
2021-06-30	115
2021-09-30	129
2021-12-31	108
2022-03-31	74
2022-06-30	151
2022-09-30	130
2022-12-31	126
2023-03-31	67
2023-06-30	100
2023-09-30	146