Quarter	US dollars
2004-12-31	6564
2005-03-31	7354
2005-06-30	8672
2005-09-30	10056
2005-12-31	9366
2006-03-31	10846
2006-06-30	11731
2006-09-30	12605
2006-12-31	14681
2007-03-31	15051
2007-06-30	16699
2007-09-30	18489
2007-12-31	21908
2008-03-31	23383
2008-06-30	27613
2008-09-30	25577
2008-12-31	21979
2009-03-31	22411
2009-06-30	27707
2009-09-30	31684
2009-12-31	29911
2010-03-31	30411
2010-06-30	30472
2010-09-30	35205
2010-12-31	39595
2011-03-31	40618
2011-06-30	47786
2011-09-30	39340
2011-12-31	41100
2012-03-31	40716
2012-06-30	37731
2012-09-30	38346
2012-12-31	39985
2013-03-31	42098
2013-06-30	39037
2013-09-30	42184
2013-12-31	40244
2014-03-31	40222
2014-06-30	41002
2014-09-30	39800
2014-12-31	37851
2015-03-31	32935
2015-06-30	33180
2015-09-30	27307
2015-12-31	26867
2016-03-31	28188
2016-06-30	31092
2016-09-30	7146
2016-12-31	6332
2017-03-31	6142
2017-06-30	5344
2017-09-30	5185
2017-12-31	4881
2018-03-31	5320
2018-06-30	4044
2018-09-30	3298
2018-12-31	3577
2019-03-31	3746
2019-06-30	4997
2019-09-30	4870
2019-12-31	4494
2020-03-31	4515
2020-06-30	4568
2020-09-30	2851
2020-12-31	2903
2021-03-31	2315
2021-06-30	2311
2021-09-30	2027
2021-12-31	2606
2022-03-31	4017
2022-06-30	3409
2022-09-30	3725
2022-12-31	3136
2023-03-31	3765
2023-06-30	3439
2023-09-30	3616