Quarter	US dollars
2004-12-31	2696
2005-03-31	2544
2005-06-30	3216
2005-09-30	3318
2005-12-31	4645
2006-03-31	5245
2006-06-30	5940
2006-09-30	3559
2006-12-31	7503
2007-03-31	7633
2007-06-30	9021
2007-09-30	8891
2007-12-31	11063
2008-03-31	10204
2008-06-30	12546
2008-09-30	10094
2008-12-31	7822
2009-03-31	7262
2009-06-30	5166
2009-09-30	2399
2009-12-31	4337
2010-03-31	4394
2010-06-30	2614
2010-09-30	3702
2010-12-31	3374
2011-03-31	3680
2011-06-30	3075
2011-09-30	3102
2011-12-31	2189
2012-03-31	1785
2012-06-30	2328
2012-09-30	3151
2012-12-31	2606
2013-03-31	2077
2013-06-30	2108
2013-09-30	2449
2013-12-31	2724
2014-03-31	2656
2014-06-30	2804
2014-09-30	2636
2014-12-31	3064
2015-03-31	2543
2015-06-30	2548
2015-09-30	2846
2015-12-31	2974
2016-03-31	3712
2016-06-30	3044
2016-09-30	3584
2016-12-31	4312
2017-03-31	3693
2017-06-30	3502
2017-09-30	3295
2017-12-31	4504
2018-03-31	3771
2018-06-30	3579
2018-09-30	2586
2018-12-31	3131
2019-03-31	11641
2019-06-30	9676
2019-09-30	8193
2019-12-31	9513
2020-03-31	11672
2020-06-30	11215
2020-09-30	11067
2020-12-31	11868
2021-03-31	12528
2021-06-30	12491
2021-09-30	12088
2021-12-31	12079
2022-03-31	13815
2022-06-30	13704
2022-09-30	12760
2022-12-31	12990
2023-03-31	12478
2023-06-30	11439
2023-09-30	11825