Quarter	US dollars
2004-12-31	11834
2005-03-31	11076
2005-06-30	11657
2005-09-30	12681
2005-12-31	11457
2006-03-31	16901
2006-06-30	20723
2006-09-30	23319
2006-12-31	21363
2007-03-31	25024
2007-06-30	29348
2007-09-30	37745
2007-12-31	40610
2008-03-31	44856
2008-06-30	44282
2008-09-30	38304
2008-12-31	31555
2009-03-31	31621
2009-06-30	32654
2009-09-30	26136
2009-12-31	25876
2010-03-31	22819
2010-06-30	18302
2010-09-30	18362
2010-12-31	18963
2011-03-31	18327
2011-06-30	18826
2011-09-30	17335
2011-12-31	11941
2012-03-31	11508
2012-06-30	11797
2012-09-30	6240
2012-12-31	7082
2013-03-31	7237
2013-06-30	6009
2013-09-30	6342
2013-12-31	6810
2014-03-31	7313
2014-06-30	7509
2014-09-30	7349
2014-12-31	7434
2015-03-31	6463
2015-06-30	8969
2015-09-30	8638
2015-12-31	13056
2016-03-31	12060
2016-06-30	10793
2016-09-30	8690
2016-12-31	9382
2017-03-31	10677
2017-06-30	11409
2017-09-30	10126
2017-12-31	10584
2018-03-31	7480
2018-06-30	6431
2018-09-30	6664
2018-12-31	7161
2019-03-31	7623
2019-06-30	7596
2019-09-30	6873
2019-12-31	8620
2020-03-31	6860
2020-06-30	9835
2020-09-30	8266
2020-12-31	9930
2021-03-31	10430
2021-06-30	11296
2021-09-30	10284
2021-12-31	13019
2022-03-31	12553
2022-06-30	13883
2022-09-30	11451
2022-12-31	13792
2023-03-31	14641
2023-06-30	16536
2023-09-30	16923