Quarter	US dollars
1999-03-31	29
1999-06-30	35
1999-09-30	24
1999-12-31	22
2000-03-31	34
2000-06-30	29
2000-09-30	27
2000-12-31	36
2001-03-31	44
2001-06-30	42
2001-09-30	52
2001-12-31	25
2002-03-31	49
2002-06-30	87
2002-09-30	49
2002-12-31	62
2003-03-31	57
2003-06-30	62
2003-09-30	83
2003-12-31	100
2004-03-31	138
2004-06-30	107
2004-09-30	107
2004-12-31	127
2005-03-31	118
2005-06-30	152
2005-09-30	187
2005-12-31	192
2006-03-31	177
2006-06-30	168
2006-09-30	146
2006-12-31	137
2007-03-31	183
2007-06-30	189
2007-09-30	169
2007-12-31	188
2008-03-31	191
2008-06-30	200
2008-09-30	178
2008-12-31	200
2009-03-31	233
2009-06-30	244
2009-09-30	277
2009-12-31	214
2010-03-31	256
2010-06-30	184
2010-09-30	210
2010-12-31	308
2011-03-31	484
2011-06-30	524
2011-09-30	473
2011-12-31	349
2012-03-31	348
2012-06-30	445
2012-09-30	587
2012-12-31	581
2013-03-31	648
2013-06-30	700
2013-09-30	717
2013-12-31	620
2014-03-31	650
2014-06-30	746
2014-09-30	943
2014-12-31	883
2015-03-31	1036
2015-06-30	1024
2015-09-30	785
2015-12-31	800
2016-03-31	731
2016-06-30	644
2016-09-30	698
2016-12-31	527
2017-03-31	649
2017-06-30	592
2017-09-30	624
2017-12-31	708
2018-03-31	1095
2018-06-30	1232
2018-09-30	1150
2018-12-31	1084
2019-03-31	1111
2019-06-30	1057
2019-09-30	982
2019-12-31	903
2020-03-31	925
2020-06-30	1175
2020-09-30	1116
2020-12-31	1222
2021-03-31	1461
2021-06-30	1748
2021-09-30	1567
2021-12-31	1723
2022-03-31	2169
2022-06-30	2228
2022-09-30	2280
2022-12-31	1877
2023-03-31	1674
2023-06-30	2093
2023-09-30	1982