Quarter	US dollars
2004-12-31	3967
2005-03-31	4855
2005-06-30	6498
2005-09-30	7010
2005-12-31	8877
2006-03-31	23346
2006-06-30	24373
2006-09-30	23352
2006-12-31	26369
2007-03-31	22855
2007-06-30	11487
2007-09-30	14156
2007-12-31	15852
2008-03-31	16168
2008-06-30	19614
2008-09-30	21804
2008-12-31	23523
2009-03-31	22993
2009-06-30	22632
2009-09-30	23684
2009-12-31	23347
2010-03-31	21965
2010-06-30	20383
2010-09-30	22404
2010-12-31	32164
2011-03-31	31716
2011-06-30	34694
2011-09-30	43863
2011-12-31	39721
2012-03-31	30372
2012-06-30	39362
2012-09-30	36999
2012-12-31	49165
2013-03-31	98827
2013-06-30	96571
2013-09-30	122093
2013-12-31	138562
2014-03-31	152366
2014-06-30	71771
2014-09-30	61876
2014-12-31	48748
2015-03-31	41150
2015-06-30	39838
2015-09-30	37695
2015-12-31	35889
2016-03-31	42302
2016-06-30	37586
2016-09-30	38187
2016-12-31	33978
2017-03-31	34837
2017-06-30	26184
2017-09-30	25925
2017-12-31	29125
2018-03-31	20790
2018-06-30	19629
2018-09-30	22291
2018-12-31	19657
2019-03-31	20636
2019-06-30	20877
2019-09-30	33087
2019-12-31	32322
2020-03-31	32846
2020-06-30	31383
2020-09-30	33562
2020-12-31	30843
2021-03-31	32959
2021-06-30	30195
2021-09-30	33463
2021-12-31	32419
2022-03-31	34317
2022-06-30	34228
2022-09-30	38060
2022-12-31	36783
2023-03-31	39517
2023-06-30	33556
2023-09-30	33968