Quarter	US dollars
2004-12-31	183493
2005-03-31	214097
2005-06-30	185169
2005-09-30	193107
2005-12-31	174410
2006-03-31	208088
2006-06-30	202998
2006-09-30	216899
2006-12-31	232233
2007-03-31	262942
2007-06-30	256472
2007-09-30	295549
2007-12-31	254218
2008-03-31	281211
2008-06-30	216425
2008-09-30	222180
2008-12-31	127913
2009-03-31	114903
2009-06-30	129032
2009-09-30	107499
2009-12-31	106927
2010-03-31	103240
2010-06-30	95197
2010-09-30	103441
2010-12-31	98972
2011-03-31	103549
2011-06-30	105239
2011-09-30	85694
2011-12-31	73274
2012-03-31	79715
2012-06-30	67321
2012-09-30	74179
2012-12-31	70087
2013-03-31	68386
2013-06-30	53192
2013-09-30	56674
2013-12-31	57146
2014-03-31	62837
2014-06-30	71318
2014-09-30	66973
2014-12-31	64411
2015-03-31	61107
2015-06-30	58237
2015-09-30	63392
2015-12-31	54415
2016-03-31	58930
2016-06-30	61595
2016-09-30	55140
2016-12-31	63330
2017-03-31	68031
2017-06-30	65082
2017-09-30	62138
2017-12-31	60368
2018-03-31	72944
2018-06-30	66138
2018-09-30	65658
2018-12-31	60982
2019-03-31	59387
2019-06-30	45356
2019-09-30	49939
2019-12-31	57584
2020-03-31	63941
2020-06-30	58766
2020-09-30	55594
2020-12-31	52736
2021-03-31	63539
2021-06-30	70372
2021-09-30	75281
2021-12-31	75990
2022-03-31	73730
2022-06-30	62509
2022-09-30	60640
2022-12-31	55977
2023-03-31	56927
2023-06-30	62271
2023-09-30	56397