Quarter	US dollars
2004-12-31	2423
2005-03-31	2715
2005-06-30	3599
2005-09-30	4312
2005-12-31	4108
2006-03-31	4631
2006-06-30	5737
2006-09-30	5773
2006-12-31	6349
2007-03-31	11731
2007-06-30	12837
2007-09-30	15855
2007-12-31	16234
2008-03-31	17430
2008-06-30	21863
2008-09-30	18195
2008-12-31	16051
2009-03-31	15231
2009-06-30	14719
2009-09-30	14518
2009-12-31	14814
2010-03-31	14128
2010-06-30	14455
2010-09-30	16143
2010-12-31	19410
2011-03-31	19471
2011-06-30	23660
2011-09-30	25648
2011-12-31	22743
2012-03-31	14691
2012-06-30	14304
2012-09-30	10946
2012-12-31	13049
2013-03-31	33538
2013-06-30	29661
2013-09-30	29117
2013-12-31	23962
2014-03-31	22899
2014-06-30	19773
2014-09-30	18483
2014-12-31	17561
2015-03-31	14473
2015-06-30	13278
2015-09-30	12645
2015-12-31	12199
2016-03-31	14572
2016-06-30	13273
2016-09-30	13578
2016-12-31	12543
2017-03-31	13044
2017-06-30	9639
2017-09-30	10110
2017-12-31	11131
2018-03-31	7391
2018-06-30	6687
2018-09-30	4773
2018-12-31	6889
2019-03-31	7615
2019-06-30	8516
2019-09-30	8111
2019-12-31	7914
2020-03-31	7880
2020-06-30	7697
2020-09-30	8008
2020-12-31	7870
2021-03-31	8180
2021-06-30	7924
2021-09-30	8747
2021-12-31	8597
2022-03-31	8853
2022-06-30	8671
2022-09-30	8852
2022-12-31	10687
2023-03-31	12268
2023-06-30	11284
2023-09-30	10446