Quarter	US dollars
1999-09-30	1368
1999-12-31	1377
2000-03-31	1442
2000-06-30	1399
2000-09-30	1474
2000-12-31	1553
2001-03-31	1548
2001-06-30	1848
2001-09-30	1705
2001-12-31	1534
2002-03-31	1521
2002-06-30	1605
2002-09-30	2011
2002-12-31	1637
2003-03-31	1476
2003-06-30	1205
2003-09-30	1100
2003-12-31	1157
2004-03-31	1139
2004-06-30	1097
2004-09-30	1151
2004-12-31	1066
2005-03-31	1161
2005-06-30	939
2005-09-30	895
2005-12-31	927
2006-03-31	1063
2006-06-30	1069
2006-09-30	1037
2006-12-31	1329
2007-03-31	1083
2007-06-30	1146
2007-09-30	1178
2007-12-31	685
2008-03-31	632
2008-06-30	710
2008-09-30	1206
2008-12-31	689
2009-03-31	629
2009-06-30	553
2009-09-30	688
2009-12-31	767
2010-03-31	701
2010-06-30	1077
2010-09-30	1232
2010-12-31	1335
2011-03-31	1399
2011-06-30	1294
2011-09-30	830
2011-12-31	676
2012-03-31	761
2012-06-30	536
2012-09-30	628
2012-12-31	611
2013-03-31	373
2013-06-30	511
2013-09-30	398
2013-12-31	342
2014-03-31	303
2014-06-30	296
2014-09-30	524
2014-12-31	353
2015-03-31	290
2015-06-30	167
2015-09-30	148
2015-12-31	102
2016-03-31	108
2016-06-30	99
2016-09-30	145
2016-12-31	138
2017-03-31	95
2017-06-30	83
2017-09-30	146
2017-12-31	151
2018-03-31	160
2018-06-30	137
2018-09-30	80
2018-12-31	61
2019-03-31	55
2019-06-30	76
2019-09-30	80
2019-12-31	59
2020-03-31	130
2020-06-30	146
2020-09-30	158
2020-12-31	162
2021-03-31	110
2021-06-30	26
2021-09-30	30
2021-12-31	190
2022-03-31	254
2022-06-30	252
2022-09-30	82
2022-12-31	99
2023-03-31	77
2023-06-30	76
2023-09-30	74