Quarter	US dollars
1999-03-31	96
1999-06-30	97
1999-09-30	113
1999-12-31	91
2000-03-31	93
2000-06-30	110
2000-09-30	90
2000-12-31	95
2001-03-31	92
2001-06-30	91
2001-09-30	102
2001-12-31	96
2002-03-31	93
2002-06-30	88
2002-09-30	92
2002-12-31	96
2003-03-31	203
2003-06-30	112
2003-09-30	117
2003-12-31	138
2004-03-31	252
2004-06-30	268
2004-09-30	276
2004-12-31	368
2005-03-31	250
2005-06-30	329
2005-09-30	218
2005-12-31	208
2006-03-31	206
2006-06-30	181
2006-09-30	622
2006-12-31	278
2007-03-31	348
2007-06-30	353
2007-09-30	405
2007-12-31	417
2008-03-31	407
2008-06-30	456
2008-09-30	368
2008-12-31	450
2009-03-31	413
2009-06-30	455
2009-09-30	351
2009-12-31	448
2010-03-31	675
2010-06-30	450
2010-09-30	588
2010-12-31	844
2011-03-31	663
2011-06-30	619
2011-09-30	630
2011-12-31	661
2012-03-31	596
2012-06-30	512
2012-09-30	595
2012-12-31	852
2013-03-31	839
2013-06-30	939
2013-09-30	801
2013-12-31	778
2014-03-31	882
2014-06-30	1117
2014-09-30	1141
2014-12-31	923
2015-03-31	942
2015-06-30	1069
2015-09-30	1099
2015-12-31	1097
2016-03-31	1619
2016-06-30	1300
2016-09-30	1597
2016-12-31	1530
2017-03-31	1779
2017-06-30	1876
2017-09-30	1865
2017-12-31	2011
2018-03-31	2368
2018-06-30	2166
2018-09-30	2542
2018-12-31	1506
2019-03-31	1477
2019-06-30	1495
2019-09-30	1622
2019-12-31	1606
2020-03-31	1480
2020-06-30	1445
2020-09-30	1475
2020-12-31	1535
2021-03-31	1366
2021-06-30	1407
2021-09-30	1518
2021-12-31	1577
2022-03-31	1372
2022-06-30	1484
2022-09-30	1343
2022-12-31	1273
2023-03-31	1409
2023-06-30	1594
2023-09-30	1668