Quarter	US dollars
2004-12-31	2553
2005-03-31	4047
2005-06-30	2198
2005-09-30	5609
2005-12-31	1725
2006-03-31	1186
2006-06-30	2286
2006-09-30	4396
2006-12-31	4360
2007-03-31	4729
2007-06-30	7807
2007-09-30	10014
2007-12-31	11452
2008-03-31	10134
2008-06-30	12148
2008-09-30	12296
2008-12-31	13032
2009-03-31	11453
2009-06-30	12206
2009-09-30	11993
2009-12-31	12613
2010-03-31	15765
2010-06-30	14474
2010-09-30	17088
2010-12-31	15658
2011-03-31	22501
2011-06-30	28528
2011-09-30	29957
2011-12-31	32805
2012-03-31	31590
2012-06-30	29883
2012-09-30	26867
2012-12-31	28831
2013-03-31	36012
2013-06-30	42046
2013-09-30	36590
2013-12-31	41897
2014-03-31	40719
2014-06-30	40376
2014-09-30	41506
2014-12-31	44158
2015-03-31	37365
2015-06-30	40324
2015-09-30	38969
2015-12-31	36710
2016-03-31	35749
2016-06-30	36789
2016-09-30	35554
2016-12-31	39565
2017-03-31	36728
2017-06-30	56942
2017-09-30	51206
2017-12-31	66587
2018-03-31	56524
2018-06-30	50150
2018-09-30	53323
2018-12-31	56293
2019-03-31	54736
2019-06-30	60466
2019-09-30	57339
2019-12-31	60169
2020-03-31	65345
2020-06-30	64696
2020-09-30	62008
2020-12-31	76193
2021-03-31	78983
2021-06-30	78996
2021-09-30	77671
2021-12-31	77921
2022-03-31	72753
2022-06-30	67866
2022-09-30	67560
2022-12-31	64734
2023-03-31	72673
2023-06-30	70446
2023-09-30	75123