Quarter	US dollars
2004-12-31	14701
2005-03-31	11238
2005-06-30	9886
2005-09-30	9109
2005-12-31	8791
2006-03-31	10232
2006-06-30	9092
2006-09-30	9240
2006-12-31	7088
2007-03-31	9195
2007-06-30	7135
2007-09-30	9751
2007-12-31	7755
2008-03-31	7819
2008-06-30	8536
2008-09-30	7038
2008-12-31	8460
2009-03-31	13063
2009-06-30	14003
2009-09-30	14613
2009-12-31	14123
2010-03-31	14918
2010-06-30	15393
2010-09-30	15564
2010-12-31	15976
2011-03-31	23484
2011-06-30	31617
2011-09-30	32959
2011-12-31	32179
2012-03-31	37856
2012-06-30	38384
2012-09-30	38906
2012-12-31	38009
2013-03-31	41021
2013-06-30	38649
2013-09-30	44304
2013-12-31	42783
2014-03-31	49646
2014-06-30	49436
2014-09-30	52058
2014-12-31	48750
2015-03-31	49176
2015-06-30	52867
2015-09-30	57287
2015-12-31	49571
2016-03-31	55367
2016-06-30	52251
2016-09-30	51843
2016-12-31	48233
2017-03-31	45731
2017-06-30	47685
2017-09-30	43096
2017-12-31	40168
2018-03-31	44586
2018-06-30	39765
2018-09-30	40559
2018-12-31	40672
2019-03-31	49345
2019-06-30	51144
2019-09-30	51940
2019-12-31	47707
2020-03-31	50770
2020-06-30	55108
2020-09-30	58015
2020-12-31	57060
2021-03-31	57273
2021-06-30	56272
2021-09-30	55266
2021-12-31	59409
2022-03-31	64471
2022-06-30	61902
2022-09-30	55666
2022-12-31	59343
2023-03-31	61067
2023-06-30	60150
2023-09-30	62761