Quarter	US dollars
1999-03-31	99
1999-06-30	101
1999-09-30	112
1999-12-31	98
2000-03-31	106
2000-06-30	247
2000-09-30	156
2000-12-31	196
2001-03-31	385
2001-06-30	307
2001-09-30	151
2001-12-31	152
2002-03-31	131
2002-06-30	293
2002-09-30	273
2002-12-31	140
2003-03-31	160
2003-06-30	170
2003-09-30	272
2003-12-31	149
2004-03-31	128
2004-06-30	112
2004-09-30	101
2004-12-31	118
2005-03-31	379
2005-06-30	144
2005-09-30	176
2005-12-31	170
2006-03-31	159
2006-06-30	167
2006-09-30	129
2006-12-31	146
2007-03-31	224
2007-06-30	97
2007-09-30	99
2007-12-31	99
2008-03-31	100
2008-06-30	48
2008-09-30	92
2008-12-31	72
2009-03-31	65
2009-06-30	61
2009-09-30	15
2009-12-31	51
2010-03-31	58
2010-06-30	55
2010-09-30	71
2010-12-31	460
2011-03-31	138
2011-06-30	132
2011-09-30	324
2011-12-31	310
2012-03-31	429
2012-06-30	627
2012-09-30	466
2012-12-31	484
2013-03-31	310
2013-06-30	502
2013-09-30	241
2013-12-31	558
2014-03-31	480
2014-06-30	493
2014-09-30	2124
2014-12-31	573
2015-03-31	251
2015-06-30	249
2015-09-30	232
2015-12-31	140
2016-03-31	158
2016-06-30	137
2016-09-30	189
2016-12-31	242
2017-03-31	312
2017-06-30	488
2017-09-30	649
2017-12-31	531
2018-03-31	455
2018-06-30	629
2018-09-30	804
2018-12-31	824
2019-03-31	849
2019-06-30	861
2019-09-30	970
2019-12-31	938
2020-03-31	493
2020-06-30	218
2020-09-30	193
2020-12-31	51
2021-03-31	45
2021-06-30	37
2021-09-30	17
2021-12-31	30
2022-03-31	12
2022-06-30	10
2022-09-30	13
2022-12-31	7
2023-03-31	112
2023-06-30	95
2023-09-30	55