Quarter	US dollars
2004-12-31	11210
2005-03-31	14123
2005-06-30	13408
2005-09-30	16954
2005-12-31	17568
2006-03-31	18979
2006-06-30	21703
2006-09-30	23463
2006-12-31	24300
2007-03-31	27364
2007-06-30	29257
2007-09-30	33446
2007-12-31	35215
2008-03-31	38504
2008-06-30	41838
2008-09-30	42271
2008-12-31	36873
2009-03-31	33304
2009-06-30	34141
2009-09-30	36776
2009-12-31	37743
2010-03-31	37546
2010-06-30	40749
2010-09-30	74102
2010-12-31	101885
2011-03-31	102561
2011-06-30	102054
2011-09-30	122113
2011-12-31	113955
2012-03-31	165242
2012-06-30	162609
2012-09-30	153858
2012-12-31	181276
2013-03-31	316761
2013-06-30	315663
2013-09-30	294316
2013-12-31	250279
2014-03-31	252961
2014-06-30	228496
2014-09-30	229518
2014-12-31	218454
2015-03-31	221722
2015-06-30	224340
2015-09-30	217185
2015-12-31	199745
2016-03-31	208792
2016-06-30	204443
2016-09-30	193476
2016-12-31	186138
2017-03-31	187022
2017-06-30	166855
2017-09-30	165006
2017-12-31	158522
2018-03-31	149119
2018-06-30	158448
2018-09-30	152715
2018-12-31	159925
2019-03-31	170409
2019-06-30	175224
2019-09-30	184175
2019-12-31	181032
2020-03-31	192576
2020-06-30	173379
2020-09-30	171631
2020-12-31	155330
2021-03-31	157633
2021-06-30	151553
2021-09-30	148367
2021-12-31	144769
2022-03-31	154398
2022-06-30	147077
2022-09-30	144663
2022-12-31	138572
2023-03-31	140379
2023-06-30	125858
2023-09-30	128708