Quarter	US dollars
1999-09-30	165
1999-12-31	155
2000-03-31	158
2000-06-30	195
2000-09-30	136
2000-12-31	164
2001-03-31	193
2001-06-30	167
2001-09-30	210
2001-12-31	205
2002-03-31	179
2002-06-30	150
2002-09-30	181
2002-12-31	175
2003-03-31	204
2003-06-30	224
2003-09-30	201
2003-12-31	224
2004-03-31	187
2004-06-30	178
2004-09-30	154
2004-12-31	244
2005-03-31	198
2005-06-30	197
2005-09-30	214
2005-12-31	397
2006-03-31	383
2006-06-30	337
2006-09-30	333
2006-12-31	233
2007-03-31	228
2007-06-30	245
2007-09-30	269
2007-12-31	313
2008-03-31	384
2008-06-30	414
2008-09-30	383
2008-12-31	382
2009-03-31	324
2009-06-30	354
2009-09-30	299
2009-12-31	215
2010-03-31	291
2010-06-30	305
2010-09-30	238
2010-12-31	214
2011-03-31	276
2011-06-30	278
2011-09-30	266
2011-12-31	951
2012-03-31	345
2012-06-30	351
2012-09-30	276
2012-12-31	280
2013-03-31	346
2013-06-30	300
2013-09-30	298
2013-12-31	367
2014-03-31	505
2014-06-30	486
2014-09-30	447
2014-12-31	542
2015-03-31	594
2015-06-30	473
2015-09-30	11
2015-12-31	64
2016-03-31	9
2016-06-30	168
2016-09-30	36
2016-12-31	36
2017-03-31	40
2017-06-30	39
2017-09-30	35
2017-12-31	34
2018-03-31	34
2018-06-30	33
2018-09-30	33
2018-12-31	32
2019-03-31	30
2019-06-30	33
2019-09-30	33
2019-12-31	9
2020-03-31	1
2020-06-30	6
2020-09-30	4
2020-12-31	5
2021-03-31	30
2021-06-30	21
2021-09-30	11
2021-12-31	12
2022-03-31	11
2022-06-30	-73
2022-09-30	12
2022-12-31	21
2023-03-31	3
2023-06-30	-1
2023-09-30	3