Quarter	US dollars
2004-12-31	2619
2005-03-31	4123
2005-06-30	2268
2005-09-30	5742
2005-12-31	1711
2006-03-31	1174
2006-06-30	2273
2006-09-30	4403
2006-12-31	4341
2007-03-31	4723
2007-06-30	7801
2007-09-30	10008
2007-12-31	11448
2008-03-31	10065
2008-06-30	12144
2008-09-30	12296
2008-12-31	13029
2009-03-31	11453
2009-06-30	12206
2009-09-30	11993
2009-12-31	12613
2010-03-31	15765
2010-06-30	14474
2010-09-30	17107
2010-12-31	15677
2011-03-31	22521
2011-06-30	37908
2011-09-30	41177
2011-12-31	36862
2012-03-31	33603
2012-06-30	29921
2012-09-30	26927
2012-12-31	28912
2013-03-31	36749
2013-06-30	42128
2013-09-30	36678
2013-12-31	41984
2014-03-31	41296
2014-06-30	40463
2014-09-30	41594
2014-12-31	44228
2015-03-31	37429
2015-06-30	40169
2015-09-30	39644
2015-12-31	36861
2016-03-31	35926
2016-06-30	36994
2016-09-30	35779
2016-12-31	39702
2017-03-31	36868
2017-06-30	57422
2017-09-30	51865
2017-12-31	67138
2018-03-31	56786
2018-06-30	50323
2018-09-30	53408
2018-12-31	56637
2019-03-31	55424
2019-06-30	61197
2019-09-30	58396
2019-12-31	61160
2020-03-31	66294
2020-06-30	65218
2020-09-30	62710
2020-12-31	76993
2021-03-31	80358
2021-06-30	79850
2021-09-30	78382
2021-12-31	78656
2022-03-31	73376
2022-06-30	68468
2022-09-30	68166
2022-12-31	65116
2023-03-31	73018
2023-06-30	70762
2023-09-30	75434