Quarter	US dollars
1999-03-31	1364
1999-06-30	514
1999-09-30	422
1999-12-31	338
2000-03-31	447
2000-06-30	477
2000-09-30	404
2000-12-31	686
2001-03-31	528
2001-06-30	582
2001-09-30	675
2001-12-31	1100
2002-03-31	809
2002-06-30	978
2002-09-30	1440
2002-12-31	1189
2003-03-31	1362
2003-06-30	1128
2003-09-30	1155
2003-12-31	1069
2004-03-31	1214
2004-06-30	663
2004-09-30	490
2004-12-31	369
2005-03-31	421
2005-06-30	301
2005-09-30	381
2005-12-31	563
2006-03-31	566
2006-06-30	319
2006-09-30	204
2006-12-31	499
2007-03-31	1002
2007-06-30	563
2007-09-30	1106
2007-12-31	894
2008-03-31	1097
2008-06-30	892
2008-09-30	472
2008-12-31	168
2009-03-31	54
2009-06-30	157
2009-09-30	150
2009-12-31	237
2010-03-31	102
2010-06-30	179
2010-09-30	77
2010-12-31	59
2011-03-31	127
2011-06-30	168
2011-09-30	74
2011-12-31	74
2012-03-31	141
2012-06-30	112
2012-09-30	273
2012-12-31	319
2013-03-31	287
2013-06-30	421
2013-09-30	430
2013-12-31	280
2014-03-31	482
2014-06-30	582
2014-09-30	260
2014-12-31	318
2015-03-31	338
2015-06-30	206
2015-09-30	186
2015-12-31	221
2016-03-31	170
2016-06-30	260
2016-09-30	231
2016-12-31	285
2017-03-31	296
2017-06-30	278
2017-09-30	243
2017-12-31	279
2018-03-31	240
2018-06-30	217
2018-09-30	203
2018-12-31	159
2019-03-31	325
2019-06-30	705
2019-09-30	183
2019-12-31	96
2020-03-31	56
2020-06-30	26
2020-09-30	27
2020-12-31	16
2021-03-31	19
2021-06-30	14
2021-09-30	10
2021-12-31	11
2022-03-31	22
2022-06-30	27
2022-09-30	27
2022-12-31	21
2023-03-31	26
2023-06-30	43
2023-09-30	57