Quarter	US dollars
2004-12-31	54
2005-03-31	51
2005-06-30	43
2005-09-30	44
2005-12-31	46
2006-03-31	45
2006-06-30	65
2006-09-30	41
2006-12-31	43
2007-03-31	63
2007-06-30	100
2007-09-30	102
2007-12-31	111
2008-03-31	131
2008-06-30	189
2008-09-30	283
2008-12-31	174
2009-03-31	132
2009-06-30	231
2009-09-30	270
2009-12-31	234
2010-03-31	346
2010-06-30	386
2010-09-30	408
2010-12-31	380
2011-03-31	428
2011-06-30	389
2011-09-30	413
2011-12-31	470
2012-03-31	446
2012-06-30	347
2012-09-30	425
2012-12-31	427
2013-03-31	483
2013-06-30	494
2013-09-30	423
2013-12-31	420
2014-03-31	442
2014-06-30	448
2014-09-30	345
2014-12-31	336
2015-03-31	310
2015-06-30	315
2015-09-30	291
2015-12-31	310
2016-03-31	355
2016-06-30	308
2016-09-30	381
2016-12-31	335
2017-03-31	467
2017-06-30	498
2017-09-30	463
2017-12-31	508
2018-03-31	393
2018-06-30	354
2018-09-30	293
2018-12-31	324
2019-03-31	164
2019-06-30	213
2019-09-30	169
2019-12-31	168
2020-03-31	134
2020-06-30	142
2020-09-30	142
2020-12-31	74
2021-03-31	65
2021-06-30	80
2021-09-30	16
2021-12-31	20
2022-03-31	32
2022-06-30	25
2022-09-30	32
2022-12-31	20
2023-03-31	36
2023-06-30	72
2023-09-30	31