Quarter	US dollars
2004-12-31	1628
2005-03-31	1764
2005-06-30	1981
2005-09-30	2160
2005-12-31	2359
2006-03-31	2480
2006-06-30	2415
2006-09-30	2281
2006-12-31	2311
2007-03-31	3542
2007-06-30	3622
2007-09-30	3824
2007-12-31	4358
2008-03-31	4691
2008-06-30	4388
2008-09-30	4063
2008-12-31	4201
2009-03-31	4424
2009-06-30	4473
2009-09-30	4465
2009-12-31	4399
2010-03-31	4285
2010-06-30	3752
2010-09-30	3646
2010-12-31	3781
2011-03-31	3765
2011-06-30	3781
2011-09-30	3558
2011-12-31	3301
2012-03-31	3251
2012-06-30	3379
2012-09-30	3632
2012-12-31	3531
2013-03-31	1626
2013-06-30	3579
2013-09-30	3427
2013-12-31	3302
2014-03-31	3076
2014-06-30	2862
2014-09-30	2732
2014-12-31	2691
2015-03-31	2432
2015-06-30	2049
2015-09-30	1622
2015-12-31	1498
2016-03-31	1216
2016-06-30	1405
2016-09-30	1278
2016-12-31	858
2017-03-31	685
2017-06-30	556
2017-09-30	491
2017-12-31	442
2018-03-31	724
2018-06-30	691
2018-09-30	626
2018-12-31	663
2019-03-31	622
2019-06-30	596
2019-09-30	474
2019-12-31	458
2020-03-31	458
2020-06-30	40
2020-09-30	22
2020-12-31	78
2021-03-31	77
2021-06-30	64
2021-09-30	82
2021-12-31	58
2022-03-31	51
2022-06-30	48
2022-09-30	47
2022-12-31	46
2023-03-31	94
2023-06-30	76
2023-09-30	76