Quarter	US dollars
1999-03-31	233
1999-06-30	256
1999-09-30	253
1999-12-31	220
2000-03-31	190
2000-06-30	204
2000-09-30	236
2000-12-31	212
2001-03-31	247
2001-06-30	250
2001-09-30	277
2001-12-31	242
2002-03-31	196
2002-06-30	223
2002-09-30	284
2002-12-31	258
2003-03-31	218
2003-06-30	189
2003-09-30	168
2003-12-31	221
2004-03-31	204
2004-06-30	246
2004-09-30	279
2004-12-31	309
2005-03-31	297
2005-06-30	297
2005-09-30	305
2005-12-31	360
2006-03-31	302
2006-06-30	358
2006-09-30	290
2006-12-31	309
2007-03-31	301
2007-06-30	370
2007-09-30	383
2007-12-31	386
2008-03-31	430
2008-06-30	417
2008-09-30	476
2008-12-31	379
2009-03-31	330
2009-06-30	407
2009-09-30	401
2009-12-31	314
2010-03-31	273
2010-06-30	352
2010-09-30	260
2010-12-31	249
2011-03-31	170
2011-06-30	294
2011-09-30	374
2011-12-31	320
2012-03-31	325
2012-06-30	164
2012-09-30	198
2012-12-31	199
2013-03-31	202
2013-06-30	160
2013-09-30	85
2013-12-31	90
2014-03-31	116
2014-06-30	110
2014-09-30	99
2014-12-31	48
2015-03-31	64
2015-06-30	68
2015-09-30	40
2015-12-31	45
2016-03-31	42
2016-06-30	90
2016-09-30	24
2016-12-31	41
2017-03-31	70
2017-06-30	89
2017-09-30	56
2017-12-31	51
2018-03-31	49
2018-06-30	89
2018-09-30	72
2018-12-31	59
2019-03-31	71
2019-06-30	74
2019-09-30	34
2019-12-31	16
2020-03-31	22
2020-06-30	62
2020-09-30	78
2020-12-31	83
2021-03-31	83
2021-06-30	119
2021-09-30	105
2021-12-31	87
2022-03-31	94
2022-06-30	69
2022-09-30	69
2022-12-31	64
2023-03-31	50
2023-06-30	50
2023-09-30	65