Quarter	US dollars
2004-12-31	4905
2005-03-31	11490
2005-06-30	5951
2005-09-30	15769
2005-12-31	6478
2006-03-31	6430
2006-06-30	9922
2006-09-30	13884
2006-12-31	16069
2007-03-31	12692
2007-06-30	17072
2007-09-30	21643
2007-12-31	15320
2008-03-31	12998
2008-06-30	9708
2008-09-30	13314
2008-12-31	9432
2009-03-31	7433
2009-06-30	4180
2009-09-30	4425
2009-12-31	2750
2010-03-31	5770
2010-06-30	6142
2010-09-30	4720
2010-12-31	8826
2011-03-31	12891
2011-06-30	6544
2011-09-30	8061
2011-12-31	2982
2012-03-31	2616
2012-06-30	2198
2012-09-30	2723
2012-12-31	3680
2013-03-31	4134
2013-06-30	3338
2013-09-30	3509
2013-12-31	5061
2014-03-31	6848
2014-06-30	3799
2014-09-30	2782
2014-12-31	2770
2015-03-31	3833
2015-06-30	3127
2015-09-30	3414
2015-12-31	2522
2016-03-31	3836
2016-06-30	4043
2016-09-30	2105
2016-12-31	3378
2017-03-31	4623
2017-06-30	2789
2017-09-30	4811
2017-12-31	6373
2018-03-31	5780
2018-06-30	3012
2018-09-30	2898
2018-12-31	4675
2019-03-31	3350
2019-06-30	3206
2019-09-30	3519
2019-12-31	3587
2020-03-31	2734
2020-06-30	2410
2020-09-30	3704
2020-12-31	4156
2021-03-31	2243
2021-06-30	3637
2021-09-30	3070
2021-12-31	2799
2022-03-31	3230
2022-06-30	3813
2022-09-30	5251
2022-12-31	3973
2023-03-31	3693
2023-06-30	3318
2023-09-30	3805