Quarter	US dollars
1999-09-30	568
1999-12-31	622
2000-03-31	700
2000-06-30	713
2000-09-30	757
2000-12-31	743
2001-03-31	781
2001-06-30	758
2001-09-30	722
2001-12-31	585
2002-03-31	481
2002-06-30	504
2002-09-30	443
2002-12-31	447
2003-03-31	419
2003-06-30	391
2003-09-30	370
2003-12-31	362
2004-03-31	382
2004-06-30	452
2004-09-30	375
2004-12-31	301
2005-03-31	359
2005-06-30	317
2005-09-30	179
2005-12-31	197
2006-03-31	288
2006-06-30	368
2006-09-30	340
2006-12-31	307
2007-03-31	210
2007-06-30	494
2007-09-30	509
2007-12-31	715
2008-03-31	1238
2008-06-30	1395
2008-09-30	1550
2008-12-31	1386
2009-03-31	1151
2009-06-30	1149
2009-09-30	1286
2009-12-31	1297
2010-03-31	1404
2010-06-30	1427
2010-09-30	1839
2010-12-31	2107
2011-03-31	2411
2011-06-30	2599
2011-09-30	2705
2011-12-31	2305
2012-03-31	2865
2012-06-30	3052
2012-09-30	2962
2012-12-31	3332
2013-03-31	3074
2013-06-30	2820
2013-09-30	2667
2013-12-31	1281
2014-03-31	1371
2014-06-30	1334
2014-09-30	1446
2014-12-31	1562
2015-03-31	1232
2015-06-30	1110
2015-09-30	1281
2015-12-31	1320
2016-03-31	1209
2016-06-30	1090
2016-09-30	943
2016-12-31	851
2017-03-31	928
2017-06-30	996
2017-09-30	1429
2017-12-31	928
2018-03-31	1052
2018-06-30	824
2018-09-30	745
2018-12-31	1180
2019-03-31	1114
2019-06-30	944
2019-09-30	994
2019-12-31	889
2020-03-31	1046
2020-06-30	913
2020-09-30	834
2020-12-31	796
2021-03-31	679
2021-06-30	716
2021-09-30	825
2021-12-31	651
2022-03-31	559
2022-06-30	683
2022-09-30	1109
2022-12-31	683
2023-03-31	1151
2023-06-30	863
2023-09-30	668