Quarter	US dollars
2004-12-31	17554
2005-03-31	15310
2005-06-30	24880
2005-09-30	24213
2005-12-31	20333
2006-03-31	14447
2006-06-30	10407
2006-09-30	8030
2006-12-31	11401
2007-03-31	7618
2007-06-30	11121
2007-09-30	16874
2007-12-31	10253
2008-03-31	32343
2008-06-30	36896
2008-09-30	24233
2008-12-31	4917
2009-03-31	32364
2009-06-30	34492
2009-09-30	29614
2009-12-31	23072
2010-03-31	21046
2010-06-30	23713
2010-09-30	37346
2010-12-31	35177
2011-03-31	26557
2011-06-30	26014
2011-09-30	37002
2011-12-31	34940
2012-03-31	28675
2012-06-30	29008
2012-09-30	15716
2012-12-31	16199
2013-03-31	10167
2013-06-30	18795
2013-09-30	13959
2013-12-31	16878
2014-03-31	13135
2014-06-30	18125
2014-09-30	29747
2014-12-31	37247
2015-03-31	37223
2015-06-30	26024
2015-09-30	31760
2015-12-31	27446
2016-03-31	29929
2016-06-30	29016
2016-09-30	23298
2016-12-31	25285
2017-03-31	18280
2017-06-30	20579
2017-09-30	20590
2017-12-31	5717
2018-03-31	5060
2018-06-30	7977
2018-09-30	20838
2018-12-31	22382
2019-03-31	37839
2019-06-30	20281
2019-09-30	27037
2019-12-31	17983
2020-03-31	24575
2020-06-30	21021
2020-09-30	21618
2020-12-31	24204
2021-03-31	20963
2021-06-30	19564
2021-09-30	14149
2021-12-31	16397
2022-03-31	16875
2022-06-30	19699
2022-09-30	27320
2022-12-31	22919
2023-03-31	20848
2023-06-30	23612
2023-09-30	23873