Quarter	US dollars
2004-12-31	3865
2005-03-31	3422
2005-06-30	2612
2005-09-30	3723
2005-12-31	3440
2006-03-31	3674
2006-06-30	3704
2006-09-30	3957
2006-12-31	4458
2007-03-31	4735
2007-06-30	5128
2007-09-30	6597
2007-12-31	5744
2008-03-31	7336
2008-06-30	7837
2008-09-30	7822
2008-12-31	14705
2009-03-31	11099
2009-06-30	11852
2009-09-30	12172
2009-12-31	11751
2010-03-31	13726
2010-06-30	16316
2010-09-30	16231
2010-12-31	17413
2011-03-31	20137
2011-06-30	22141
2011-09-30	22557
2011-12-31	24526
2012-03-31	23722
2012-06-30	21335
2012-09-30	20046
2012-12-31	21924
2013-03-31	22466
2013-06-30	21023
2013-09-30	21430
2013-12-31	21496
2014-03-31	24284
2014-06-30	21773
2014-09-30	22569
2014-12-31	19950
2015-03-31	18109
2015-06-30	21538
2015-09-30	19353
2015-12-31	18507
2016-03-31	20240
2016-06-30	25071
2016-09-30	25223
2016-12-31	22793
2017-03-31	25407
2017-06-30	26481
2017-09-30	30111
2017-12-31	32544
2018-03-31	33935
2018-06-30	32094
2018-09-30	34173
2018-12-31	39752
2019-03-31	40853
2019-06-30	36422
2019-09-30	34581
2019-12-31	40468
2020-03-31	43799
2020-06-30	55405
2020-09-30	57872
2020-12-31	62910
2021-03-31	62008
2021-06-30	64182
2021-09-30	67811
2021-12-31	66234
2022-03-31	64568
2022-06-30	65279
2022-09-30	65033
2022-12-31	73251
2023-03-31	76236
2023-06-30	74543
2023-09-30	68472