Quarter	US dollars
2004-12-31	1181
2005-03-31	1327
2005-06-30	1429
2005-09-30	2050
2005-12-31	2547
2006-03-31	4936
2006-06-30	4912
2006-09-30	5705
2006-12-31	6617
2007-03-31	8796
2007-06-30	10205
2007-09-30	10544
2007-12-31	11006
2008-03-31	11981
2008-06-30	11692
2008-09-30	11156
2008-12-31	7787
2009-03-31	7438
2009-06-30	9374
2009-09-30	9231
2009-12-31	7682
2010-03-31	8610
2010-06-30	10053
2010-09-30	12287
2010-12-31	12291
2011-03-31	12595
2011-06-30	12031
2011-09-30	10707
2011-12-31	13678
2012-03-31	15965
2012-06-30	12960
2012-09-30	20243
2012-12-31	17756
2013-03-31	24115
2013-06-30	18414
2013-09-30	19115
2013-12-31	17100
2014-03-31	15941
2014-06-30	14261
2014-09-30	14996
2014-12-31	10353
2015-03-31	9103
2015-06-30	8233
2015-09-30	8049
2015-12-31	6094
2016-03-31	5796
2016-06-30	5239
2016-09-30	5021
2016-12-31	4600
2017-03-31	4446
2017-06-30	4862
2017-09-30	6462
2017-12-31	4585
2018-03-31	5549
2018-06-30	3398
2018-09-30	3015
2018-12-31	3679
2019-03-31	3641
2019-06-30	3807
2019-09-30	2985
2019-12-31	3063
2020-03-31	2347
2020-06-30	2520
2020-09-30	2487
2020-12-31	4141
2021-03-31	3199
2021-06-30	2449
2021-09-30	3073
2021-12-31	1619
2022-03-31	861
2022-06-30	540
2022-09-30	490
2022-12-31	542
2023-03-31	372
2023-06-30	346
2023-09-30	289