Quarter	US dollars
2004-12-31	21628
2005-03-31	28335
2005-06-30	27318
2005-09-30	29764
2005-12-31	28492
2006-03-31	29663
2006-06-30	26711
2006-09-30	29411
2006-12-31	32592
2007-03-31	16540
2007-06-30	22574
2007-09-30	36207
2007-12-31	37517
2008-03-31	32712
2008-06-30	28243
2008-09-30	40938
2008-12-31	38589
2009-03-31	33712
2009-06-30	32122
2009-09-30	36175
2009-12-31	36217
2010-03-31	34927
2010-06-30	32304
2010-09-30	36205
2010-12-31	41799
2011-03-31	42563
2011-06-30	37489
2011-09-30	32587
2011-12-31	33000
2012-03-31	25769
2012-06-30	29022
2012-09-30	29869
2012-12-31	26857
2013-03-31	23235
2013-06-30	20360
2013-09-30	18822
2013-12-31	19501
2014-03-31	17597
2014-06-30	25557
2014-09-30	27893
2014-12-31	27643
2015-03-31	28033
2015-06-30	23980
2015-09-30	32387
2015-12-31	28241
2016-03-31	28786
2016-06-30	32670
2016-09-30	33167
2016-12-31	35585
2017-03-31	40787
2017-06-30	43861
2017-09-30	44863
2017-12-31	48674
2018-03-31	33093
2018-06-30	28800
2018-09-30	30967
2018-12-31	30293
2019-03-31	33438
2019-06-30	30388
2019-09-30	32414
2019-12-31	36917
2020-03-31	43024
2020-06-30	32293
2020-09-30	23832
2020-12-31	24260
2021-03-31	29984
2021-06-30	26911
2021-09-30	24097
2021-12-31	44222
2022-03-31	35762
2022-06-30	31518
2022-09-30	19945
2022-12-31	19365
2023-03-31	23494
2023-06-30	23514
2023-09-30	27411