Quarter	US dollars
2004-12-31	351
2005-03-31	352
2005-06-30	484
2005-09-30	131
2005-12-31	122
2006-03-31	128
2006-06-30	159
2006-09-30	206
2006-12-31	160
2007-03-31	157
2007-06-30	171
2007-09-30	153
2007-12-31	151
2008-03-31	167
2008-06-30	171
2008-09-30	289
2008-12-31	237
2009-03-31	228
2009-06-30	201
2009-09-30	229
2009-12-31	218
2010-03-31	218
2010-06-30	205
2010-09-30	214
2010-12-31	233
2011-03-31	263
2011-06-30	247
2011-09-30	276
2011-12-31	300
2012-03-31	275
2012-06-30	365
2012-09-30	635
2012-12-31	527
2013-03-31	653
2013-06-30	692
2013-09-30	657
2013-12-31	651
2014-03-31	614
2014-06-30	646
2014-09-30	579
2014-12-31	662
2015-03-31	647
2015-06-30	672
2015-09-30	566
2015-12-31	533
2016-03-31	591
2016-06-30	560
2016-09-30	533
2016-12-31	599
2017-03-31	634
2017-06-30	533
2017-09-30	533
2017-12-31	501
2018-03-31	502
2018-06-30	448
2018-09-30	438
2018-12-31	401
2019-03-31	413
2019-06-30	442
2019-09-30	409
2019-12-31	440
2020-03-31	506
2020-06-30	497
2020-09-30	379
2020-12-31	415
2021-03-31	444
2021-06-30	62
2021-09-30	369
2021-12-31	373
2022-03-31	434
2022-06-30	474
2022-09-30	441
2022-12-31	434
2023-03-31	454
2023-06-30	485
2023-09-30	500