Quarter	US dollars
1999-03-31	394
1999-06-30	390
1999-09-30	393
1999-12-31	390
2000-03-31	396
2000-06-30	387
2000-09-30	378
2000-12-31	386
2001-03-31	376
2001-06-30	372
2001-09-30	375
2001-12-31	371
2002-03-31	363
2002-06-30	371
2002-09-30	367
2002-12-31	371
2003-03-31	369
2003-06-30	376
2003-09-30	331
2003-12-31	332
2004-03-31	325
2004-06-30	300
2004-09-30	291
2004-12-31	298
2005-03-31	282
2005-06-30	275
2005-09-30	271
2005-12-31	251
2006-03-31	250
2006-06-30	259
2006-09-30	256
2006-12-31	259
2007-03-31	104
2007-06-30	99
2007-09-30	90
2007-12-31	88
2008-03-31	88
2008-06-30	88
2008-09-30	85
2008-12-31	66
2009-03-31	62
2009-06-30	71
2009-09-30	64
2009-12-31	67
2010-03-31	64
2010-06-30	63
2010-09-30	68
2010-12-31	66
2011-03-31	395
2011-06-30	399
2011-09-30	305
2011-12-31	303
2012-03-31	304
2012-06-30	305
2012-09-30	360
2012-12-31	359
2013-03-31	291
2013-06-30	313
2013-09-30	66
2013-12-31	74
2014-03-31	71
2014-06-30	72
2014-09-30	56
2014-12-31	50
2015-03-31	61
2015-06-30	82
2015-09-30	74
2015-12-31	78
2016-03-31	60
2016-06-30	48
2016-09-30	44
2016-12-31	71
2017-03-31	52
2017-06-30	43
2017-09-30	51
2017-12-31	48
2018-03-31	47
2018-06-30	47
2018-09-30	49
2018-12-31	59
2019-03-31	58
2019-06-30	56
2019-09-30	35
2019-12-31	35
2020-03-31	32
2020-06-30	28
2020-09-30	31
2020-12-31	42
2021-03-31	36
2021-06-30	48
2021-09-30	41
2021-12-31	46
2022-03-31	120
2022-06-30	301
2022-09-30	387
2022-12-31	488
2023-03-31	357
2023-06-30	239
2023-09-30	145