Quarter	US dollars
1999-09-30	7
1999-12-31	8
2000-03-31	21
2000-06-30	20
2000-09-30	15
2000-12-31	18
2001-03-31	33
2001-06-30	23
2001-09-30	50
2001-12-31	47
2002-03-31	60
2002-06-30	66
2002-09-30	118
2002-12-31	111
2003-03-31	111
2003-06-30	139
2003-09-30	106
2003-12-31	154
2004-03-31	108
2004-06-30	103
2004-09-30	109
2004-12-31	186
2005-03-31	129
2005-06-30	201
2005-09-30	94
2005-12-31	100
2006-03-31	45
2006-06-30	91
2006-09-30	133
2006-12-31	92
2007-03-31	88
2007-06-30	161
2007-09-30	236
2007-12-31	838
2008-03-31	491
2008-06-30	382
2008-09-30	806
2008-12-31	1343
2009-03-31	1009
2009-06-30	804
2009-09-30	873
2009-12-31	780
2010-03-31	936
2010-06-30	1053
2010-09-30	1045
2010-12-31	567
2011-03-31	430
2011-06-30	599
2011-09-30	1204
2011-12-31	1056
2012-03-31	761
2012-06-30	1504
2012-09-30	1284
2012-12-31	763
2013-03-31	896
2013-06-30	719
2013-09-30	476
2013-12-31	402
2014-03-31	590
2014-06-30	448
2014-09-30	1021
2014-12-31	492
2015-03-31	485
2015-06-30	319
2015-09-30	304
2015-12-31	138
2016-03-31	167
2016-06-30	199
2016-09-30	162
2016-12-31	141
2017-03-31	118
2017-06-30	139
2017-09-30	177
2017-12-31	166
2018-03-31	201
2018-06-30	104
2018-09-30	99
2018-12-31	82
2019-03-31	98
2019-06-30	107
2019-09-30	142
2019-12-31	184
2020-03-31	217
2020-06-30	198
2020-09-30	227
2020-12-31	306
2021-03-31	283
2021-06-30	267
2021-09-30	204
2021-12-31	349
2022-03-31	353
2022-06-30	575
2022-09-30	628
2022-12-31	388
2023-03-31	239
2023-06-30	280
2023-09-30	332