Quarter	US dollars
2004-12-31	38108
2005-03-31	41366
2005-06-30	43093
2005-09-30	40196
2005-12-31	39670
2006-03-31	57637
2006-06-30	50492
2006-09-30	51644
2006-12-31	47371
2007-03-31	52176
2007-06-30	44725
2007-09-30	52451
2007-12-31	56143
2008-03-31	67331
2008-06-30	66853
2008-09-30	56976
2008-12-31	53966
2009-03-31	53622
2009-06-30	59706
2009-09-30	56172
2009-12-31	138556
2010-03-31	130700
2010-06-30	147691
2010-09-30	170267
2010-12-31	160716
2011-03-31	159579
2011-06-30	139681
2011-09-30	116335
2011-12-31	110102
2012-03-31	107982
2012-06-30	106356
2012-09-30	103215
2012-12-31	47219
2013-03-31	61252
2013-06-30	66456
2013-09-30	73309
2013-12-31	69879
2014-03-31	64183
2014-06-30	60900
2014-09-30	64952
2014-12-31	68188
2015-03-31	81480
2015-06-30	77037
2015-09-30	80920
2015-12-31	76033
2016-03-31	78373
2016-06-30	75987
2016-09-30	68733
2016-12-31	75483
2017-03-31	73055
2017-06-30	80615
2017-09-30	79447
2017-12-31	75624
2018-03-31	73495
2018-06-30	73645
2018-09-30	72368
2018-12-31	74872
2019-03-31	74046
2019-06-30	77307
2019-09-30	81259
2019-12-31	79784
2020-03-31	85870
2020-06-30	84455
2020-09-30	68603
2020-12-31	64183
2021-03-31	58292
2021-06-30	61694
2021-09-30	64429
2021-12-31	66638
2022-03-31	61251
2022-06-30	55529
2022-09-30	57111
2022-12-31	53746
2023-03-31	59195
2023-06-30	71174
2023-09-30	69163