Quarter	US dollars
2004-12-31	8521
2005-03-31	9677
2005-06-30	8979
2005-09-30	8787
2005-12-31	7900
2006-03-31	9923
2006-06-30	11485
2006-09-30	11863
2006-12-31	13362
2007-03-31	14090
2007-06-30	14322
2007-09-30	16770
2007-12-31	16327
2008-03-31	20996
2008-06-30	20856
2008-09-30	21804
2008-12-31	17710
2009-03-31	16744
2009-06-30	18895
2009-09-30	20808
2009-12-31	18764
2010-03-31	22242
2010-06-30	24138
2010-09-30	30161
2010-12-31	34859
2011-03-31	37098
2011-06-30	45911
2011-09-30	41739
2011-12-31	39073
2012-03-31	44979
2012-06-30	41900
2012-09-30	43785
2012-12-31	49136
2013-03-31	42967
2013-06-30	39889
2013-09-30	49309
2013-12-31	45473
2014-03-31	44455
2014-06-30	40262
2014-09-30	41819
2014-12-31	42302
2015-03-31	42505
2015-06-30	37803
2015-09-30	33763
2015-12-31	31770
2016-03-31	31450
2016-06-30	31811
2016-09-30	28984
2016-12-31	23662
2017-03-31	25350
2017-06-30	22325
2017-09-30	24716
2017-12-31	21681
2018-03-31	24872
2018-06-30	22780
2018-09-30	24621
2018-12-31	25767
2019-03-31	27986
2019-06-30	26383
2019-09-30	29936
2019-12-31	25589
2020-03-31	21780
2020-06-30	19699
2020-09-30	17005
2020-12-31	21167
2021-03-31	20465
2021-06-30	19681
2021-09-30	19513
2021-12-31	33899
2022-03-31	28175
2022-06-30	16124
2022-09-30	33639
2022-12-31	36063
2023-03-31	38637
2023-06-30	37426
2023-09-30	22876