Quarter	US dollars
1999-09-30	173
1999-12-31	187
2000-03-31	177
2000-06-30	91
2000-09-30	136
2000-12-31	120
2001-03-31	189
2001-06-30	149
2001-09-30	144
2001-12-31	150
2002-03-31	130
2002-06-30	154
2002-09-30	160
2002-12-31	208
2003-03-31	375
2003-06-30	540
2003-09-30	547
2003-12-31	1805
2004-03-31	1829
2004-06-30	1542
2004-09-30	1759
2004-12-31	2826
2005-03-31	2359
2005-06-30	3372
2005-09-30	3124
2005-12-31	2671
2006-03-31	2236
2006-06-30	3347
2006-09-30	2662
2006-12-31	2673
2007-03-31	3311
2007-06-30	5267
2007-09-30	5381
2007-12-31	5867
2008-03-31	7968
2008-06-30	9065
2008-09-30	7144
2008-12-31	16836
2009-03-31	11946
2009-06-30	9127
2009-09-30	10525
2009-12-31	9579
2010-03-31	10512
2010-06-30	12300
2010-09-30	16171
2010-12-31	11206
2011-03-31	10094
2011-06-30	10416
2011-09-30	17646
2011-12-31	18088
2012-03-31	17563
2012-06-30	11912
2012-09-30	9815
2012-12-31	6844
2013-03-31	5959
2013-06-30	4938
2013-09-30	4431
2013-12-31	4449
2014-03-31	7748
2014-06-30	10443
2014-09-30	11032
2014-12-31	11511
2015-03-31	11649
2015-06-30	8977
2015-09-30	9232
2015-12-31	5704
2016-03-31	6867
2016-06-30	6755
2016-09-30	6377
2016-12-31	5303
2017-03-31	2564
2017-06-30	2702
2017-09-30	2337
2017-12-31	2148
2018-03-31	2071
2018-06-30	1728
2018-09-30	2205
2018-12-31	3463
2019-03-31	3577
2019-06-30	3253
2019-09-30	3917
2019-12-31	2604
2020-03-31	3355
2020-06-30	2881
2020-09-30	2975
2020-12-31	2802
2021-03-31	2824
2021-06-30	2103
2021-09-30	1715
2021-12-31	1608
2022-03-31	2409
2022-06-30	2907
2022-09-30	3918
2022-12-31	3579
2023-03-31	2903
2023-06-30	3071
2023-09-30	3635