Quarter	US dollars
2004-12-31	9027
2005-03-31	8584
2005-06-30	9848
2005-09-30	9058
2005-12-31	8605
2006-03-31	10901
2006-06-30	14952
2006-09-30	11437
2006-12-31	8194
2007-03-31	12138
2007-06-30	22446
2007-09-30	19905
2007-12-31	24177
2008-03-31	38607
2008-06-30	30626
2008-09-30	28597
2008-12-31	71131
2009-03-31	41093
2009-06-30	33318
2009-09-30	36435
2009-12-31	35364
2010-03-31	32397
2010-06-30	35596
2010-09-30	43728
2010-12-31	35917
2011-03-31	38321
2011-06-30	40090
2011-09-30	44835
2011-12-31	37058
2012-03-31	35233
2012-06-30	31055
2012-09-30	28666
2012-12-31	36318
2013-03-31	32070
2013-06-30	27763
2013-09-30	23894
2013-12-31	28512
2014-03-31	28706
2014-06-30	27636
2014-09-30	32949
2014-12-31	33323
2015-03-31	26220
2015-06-30	23384
2015-09-30	28228
2015-12-31	23501
2016-03-31	27518
2016-06-30	29463
2016-09-30	26478
2016-12-31	32057
2017-03-31	19522
2017-06-30	22755
2017-09-30	21382
2017-12-31	17193
2018-03-31	15215
2018-06-30	9922
2018-09-30	17968
2018-12-31	15195
2019-03-31	18923
2019-06-30	16339
2019-09-30	18160
2019-12-31	14062
2020-03-31	17987
2020-06-30	17263
2020-09-30	15898
2020-12-31	17935
2021-03-31	21191
2021-06-30	13843
2021-09-30	12853
2021-12-31	13338
2022-03-31	20205
2022-06-30	23258
2022-09-30	23818
2022-12-31	16470
2023-03-31	13536
2023-06-30	20822
2023-09-30	19162