Quarter	US dollars
1999-03-31	125
1999-06-30	103
1999-09-30	138
1999-12-31	242
2000-03-31	231
2000-06-30	220
2000-09-30	216
2000-12-31	131
2001-03-31	165
2001-06-30	128
2001-09-30	102
2001-12-31	79
2002-03-31	52
2002-06-30	58
2002-09-30	80
2002-12-31	97
2003-03-31	85
2003-06-30	168
2003-09-30	196
2003-12-31	230
2004-03-31	200
2004-06-30	202
2004-09-30	155
2004-12-31	237
2005-03-31	191
2005-06-30	276
2005-09-30	382
2005-12-31	334
2006-03-31	461
2006-06-30	405
2006-09-30	484
2006-12-31	765
2007-03-31	1054
2007-06-30	834
2007-09-30	776
2007-12-31	573
2008-03-31	990
2008-06-30	1085
2008-09-30	929
2008-12-31	434
2009-03-31	526
2009-06-30	643
2009-09-30	667
2009-12-31	624
2010-03-31	570
2010-06-30	586
2010-09-30	407
2010-12-31	373
2011-03-31	551
2011-06-30	531
2011-09-30	675
2011-12-31	902
2012-03-31	1002
2012-06-30	1040
2012-09-30	1076
2012-12-31	1062
2013-03-31	1017
2013-06-30	687
2013-09-30	589
2013-12-31	648
2014-03-31	377
2014-06-30	318
2014-09-30	352
2014-12-31	340
2015-03-31	701
2015-06-30	250
2015-09-30	206
2015-12-31	248
2016-03-31	323
2016-06-30	362
2016-09-30	331
2016-12-31	458
2017-03-31	453
2017-06-30	319
2017-09-30	426
2017-12-31	230
2018-03-31	194
2018-06-30	299
2018-09-30	315
2018-12-31	460
2019-03-31	473
2019-06-30	783
2019-09-30	654
2019-12-31	489
2020-03-31	509
2020-06-30	550
2020-09-30	593
2020-12-31	414
2021-03-31	347
2021-06-30	288
2021-09-30	387
2021-12-31	477
2022-03-31	467
2022-06-30	485
2022-09-30	621
2022-12-31	880
2023-03-31	1047
2023-06-30	974
2023-09-30	545