Quarter	US dollars
2004-12-31	968
2005-03-31	2132
2005-06-30	2065
2005-09-30	1242
2005-12-31	1348
2006-03-31	1450
2006-06-30	1389
2006-09-30	1141
2006-12-31	1452
2007-03-31	2063
2007-06-30	2466
2007-09-30	2687
2007-12-31	2777
2008-03-31	3285
2008-06-30	3926
2008-09-30	3156
2008-12-31	3226
2009-03-31	2936
2009-06-30	3333
2009-09-30	3587
2009-12-31	3368
2010-03-31	3053
2010-06-30	2680
2010-09-30	2913
2010-12-31	5662
2011-03-31	5651
2011-06-30	5674
2011-09-30	5705
2011-12-31	5891
2012-03-31	8032
2012-06-30	7867
2012-09-30	5991
2012-12-31	9248
2013-03-31	41508
2013-06-30	42528
2013-09-30	38895
2013-12-31	34006
2014-03-31	30837
2014-06-30	25987
2014-09-30	23456
2014-12-31	21370
2015-03-31	20728
2015-06-30	21023
2015-09-30	19479
2015-12-31	18580
2016-03-31	19039
2016-06-30	20554
2016-09-30	20036
2016-12-31	17245
2017-03-31	17842
2017-06-30	18659
2017-09-30	16126
2017-12-31	18545
2018-03-31	16646
2018-06-30	14375
2018-09-30	10703
2018-12-31	10145
2019-03-31	10139
2019-06-30	11860
2019-09-30	13724
2019-12-31	12734
2020-03-31	13192
2020-06-30	12716
2020-09-30	14523
2020-12-31	13892
2021-03-31	13796
2021-06-30	14999
2021-09-30	14807
2021-12-31	14127
2022-03-31	15224
2022-06-30	13741
2022-09-30	14885
2022-12-31	16257
2023-03-31	18501
2023-06-30	17630
2023-09-30	19038