Quarter	US dollars
2004-12-31	745
2005-03-31	811
2005-06-30	1791
2005-09-30	1090
2005-12-31	2934
2006-03-31	1735
2006-06-30	2425
2006-09-30	2449
2006-12-31	2648
2007-03-31	2573
2007-06-30	3381
2007-09-30	4173
2007-12-31	4579
2008-03-31	8958
2008-06-30	10711
2008-09-30	10668
2008-12-31	13593
2009-03-31	10211
2009-06-30	8389
2009-09-30	5385
2009-12-31	4725
2010-03-31	5571
2010-06-30	6697
2010-09-30	7137
2010-12-31	6766
2011-03-31	4662
2011-06-30	6915
2011-09-30	9174
2011-12-31	5741
2012-03-31	5595
2012-06-30	5953
2012-09-30	5513
2012-12-31	3694
2013-03-31	3549
2013-06-30	4409
2013-09-30	4960
2013-12-31	3978
2014-03-31	4332
2014-06-30	4638
2014-09-30	3768
2014-12-31	4494
2015-03-31	4828
2015-06-30	3934
2015-09-30	4985
2015-12-31	3905
2016-03-31	4693
2016-06-30	4720
2016-09-30	2918
2016-12-31	3111
2017-03-31	3311
2017-06-30	2707
2017-09-30	2352
2017-12-31	2799
2018-03-31	3190
2018-06-30	3189
2018-09-30	2885
2018-12-31	2964
2019-03-31	2607
2019-06-30	3071
2019-09-30	3259
2019-12-31	3432
2020-03-31	6202
2020-06-30	5165
2020-09-30	3933
2020-12-31	3917
2021-03-31	3099
2021-06-30	3246
2021-09-30	2829
2021-12-31	3008
2022-03-31	3096
2022-06-30	3954
2022-09-30	4784
2022-12-31	4352
2023-03-31	4247
2023-06-30	4196
2023-09-30	4000