Quarter	US dollars
1999-03-31	89
1999-06-30	88
1999-09-30	101
1999-12-31	101
2000-03-31	102
2000-06-30	99
2000-09-30	98
2000-12-31	101
2001-03-31	98
2001-06-30	97
2001-09-30	99
2001-12-31	100
2002-03-31	107
2002-06-30	112
2002-09-30	116
2002-12-31	126
2003-03-31	143
2003-06-30	154
2003-09-30	128
2003-12-31	137
2004-03-31	191
2004-06-30	172
2004-09-30	226
2004-12-31	298
2005-03-31	262
2005-06-30	259
2005-09-30	278
2005-12-31	258
2006-03-31	260
2006-06-30	277
2006-09-30	306
2006-12-31	323
2007-03-31	308
2007-06-30	321
2007-09-30	395
2007-12-31	465
2008-03-31	481
2008-06-30	415
2008-09-30	423
2008-12-31	508
2009-03-31	662
2009-06-30	701
2009-09-30	634
2009-12-31	672
2010-03-31	537
2010-06-30	504
2010-09-30	548
2010-12-31	571
2011-03-31	599
2011-06-30	615
2011-09-30	604
2011-12-31	585
2012-03-31	850
2012-06-30	764
2012-09-30	838
2012-12-31	851
2013-03-31	767
2013-06-30	802
2013-09-30	816
2013-12-31	945
2014-03-31	921
2014-06-30	832
2014-09-30	928
2014-12-31	998
2015-03-31	794
2015-06-30	845
2015-09-30	825
2015-12-31	895
2016-03-31	972
2016-06-30	943
2016-09-30	962
2016-12-31	960
2017-03-31	1168
2017-06-30	1567
2017-09-30	1700
2017-12-31	1775
2018-03-31	1764
2018-06-30	1875
2018-09-30	1743
2018-12-31	1806
2019-03-31	1829
2019-06-30	1499
2019-09-30	1340
2019-12-31	1267
2020-03-31	1257
2020-06-30	1350
2020-09-30	1035
2020-12-31	719
2021-03-31	512
2021-06-30	500
2021-09-30	470
2021-12-31	491
2022-03-31	416
2022-06-30	359
2022-09-30	361
2022-12-31	385
2023-03-31	374
2023-06-30	383
2023-09-30	369