Quarter	US dollars
1999-03-31	722
1999-06-30	630
1999-09-30	836
1999-12-31	872
2000-03-31	860
2000-06-30	729
2000-09-30	662
2000-12-31	585
2001-03-31	924
2001-06-30	963
2001-09-30	561
2001-12-31	568
2002-03-31	505
2002-06-30	372
2002-09-30	295
2002-12-31	393
2003-03-31	438
2003-06-30	417
2003-09-30	284
2003-12-31	214
2004-03-31	129
2004-06-30	91
2004-09-30	67
2004-12-31	52
2005-03-31	131
2005-06-30	198
2005-09-30	217
2005-12-31	247
2006-03-31	301
2006-06-30	330
2006-09-30	181
2006-12-31	357
2007-03-31	576
2007-06-30	838
2007-09-30	488
2007-12-31	753
2008-03-31	763
2008-06-30	794
2008-09-30	790
2008-12-31	835
2009-03-31	645
2009-06-30	1239
2009-09-30	767
2009-12-31	873
2010-03-31	1109
2010-06-30	963
2010-09-30	704
2010-12-31	916
2011-03-31	619
2011-06-30	357
2011-09-30	347
2011-12-31	327
2012-03-31	260
2012-06-30	150
2012-09-30	112
2012-12-31	129
2013-03-31	167
2013-06-30	175
2013-09-30	193
2013-12-31	196
2014-03-31	158
2014-06-30	104
2014-09-30	102
2014-12-31	97
2015-03-31	86
2015-06-30	58
2015-09-30	93
2015-12-31	123
2016-03-31	173
2016-06-30	120
2016-09-30	162
2016-12-31	202
2017-03-31	120
2017-06-30	188
2017-09-30	120
2017-12-31	81
2018-03-31	176
2018-06-30	109
2018-09-30	110
2018-12-31	94
2019-03-31	116
2019-06-30	59
2019-09-30	52
2019-12-31	55
2020-03-31	79
2020-06-30	85
2020-09-30	76
2020-12-31	64
2021-03-31	82
2021-06-30	81
2021-09-30	61
2021-12-31	224
2022-03-31	91
2022-06-30	100
2022-09-30	232
2022-12-31	124
2023-03-31	110
2023-06-30	99
2023-09-30	79