Quarter	US dollars
2004-12-31	4514
2005-03-31	4662
2005-06-30	4383
2005-09-30	4167
2005-12-31	4685
2006-03-31	4969
2006-06-30	6053
2006-09-30	6272
2006-12-31	6754
2007-03-31	7382
2007-06-30	8184
2007-09-30	8836
2007-12-31	9248
2008-03-31	13455
2008-06-30	15758
2008-09-30	14772
2008-12-31	13413
2009-03-31	13013
2009-06-30	14004
2009-09-30	15230
2009-12-31	16566
2010-03-31	16640
2010-06-30	15906
2010-09-30	18559
2010-12-31	18670
2011-03-31	18511
2011-06-30	18800
2011-09-30	17463
2011-12-31	16386
2012-03-31	16280
2012-06-30	14687
2012-09-30	14143
2012-12-31	13777
2013-03-31	13077
2013-06-30	12361
2013-09-30	12568
2013-12-31	12617
2014-03-31	11711
2014-06-30	10785
2014-09-30	9478
2014-12-31	8742
2015-03-31	7440
2015-06-30	7544
2015-09-30	7368
2015-12-31	6996
2016-03-31	7097
2016-06-30	1939
2016-09-30	1885
2016-12-31	828
2017-03-31	803
2017-06-30	668
2017-09-30	612
2017-12-31	492
2018-03-31	323
2018-06-30	360
2018-09-30	412
2018-12-31	269
2019-03-31	267
2019-06-30	389
2019-09-30	275
2019-12-31	347
2020-03-31	242
2020-06-30	266
2020-09-30	204
2020-12-31	139
2021-03-31	128
2021-06-30	377
2021-09-30	369
2021-12-31	456
2022-03-31	469
2022-06-30	408
2022-09-30	253
2022-12-31	196
2023-03-31	202
2023-06-30	204
2023-09-30	215