Quarter	US dollars
2004-12-31	16367
2005-03-31	13465
2005-06-30	18612
2005-09-30	15997
2005-12-31	14459
2006-03-31	13803
2006-06-30	16267
2006-09-30	13664
2006-12-31	16672
2007-03-31	17228
2007-06-30	24376
2007-09-30	26983
2007-12-31	30580
2008-03-31	48668
2008-06-30	51068
2008-09-30	50141
2008-12-31	142580
2009-03-31	113847
2009-06-30	109203
2009-09-30	118782
2009-12-31	99021
2010-03-31	90324
2010-06-30	90100
2010-09-30	132764
2010-12-31	109526
2011-03-31	67175
2011-06-30	72563
2011-09-30	88073
2011-12-31	76178
2012-03-31	76092
2012-06-30	77462
2012-09-30	61213
2012-12-31	59590
2013-03-31	55412
2013-06-30	46109
2013-09-30	42909
2013-12-31	38735
2014-03-31	35213
2014-06-30	43731
2014-09-30	49416
2014-12-31	54079
2015-03-31	57704
2015-06-30	40886
2015-09-30	39996
2015-12-31	32110
2016-03-31	38897
2016-06-30	40917
2016-09-30	39233
2016-12-31	30048
2017-03-31	24516
2017-06-30	22762
2017-09-30	21114
2017-12-31	19869
2018-03-31	19975
2018-06-30	11361
2018-09-30	12381
2018-12-31	17838
2019-03-31	19488
2019-06-30	21066
2019-09-30	30225
2019-12-31	23693
2020-03-31	24998
2020-06-30	25870
2020-09-30	25618
2020-12-31	23393
2021-03-31	23024
2021-06-30	20416
2021-09-30	19269
2021-12-31	18271
2022-03-31	21341
2022-06-30	28493
2022-09-30	33666
2022-12-31	32308
2023-03-31	35382
2023-06-30	33301
2023-09-30	38946