Quarter	US dollars
2004-12-31	10062
2005-03-31	11679
2005-06-30	10954
2005-09-30	8651
2005-12-31	11409
2006-03-31	26862
2006-06-30	18601
2006-09-30	19881
2006-12-31	19922
2007-03-31	21145
2007-06-30	22795
2007-09-30	27419
2007-12-31	30122
2008-03-31	42686
2008-06-30	40423
2008-09-30	34501
2008-12-31	35016
2009-03-31	34088
2009-06-30	37588
2009-09-30	35274
2009-12-31	86789
2010-03-31	78988
2010-06-30	80108
2010-09-30	89914
2010-12-31	78651
2011-03-31	84824
2011-06-30	77101
2011-09-30	65334
2011-12-31	59941
2012-03-31	62326
2012-06-30	62553
2012-09-30	60260
2012-12-31	29888
2013-03-31	30992
2013-06-30	28215
2013-09-30	33455
2013-12-31	28099
2014-03-31	33068
2014-06-30	30841
2014-09-30	35838
2014-12-31	33515
2015-03-31	34598
2015-06-30	32817
2015-09-30	32914
2015-12-31	32096
2016-03-31	33183
2016-06-30	31189
2016-09-30	31482
2016-12-31	35454
2017-03-31	33671
2017-06-30	36433
2017-09-30	34503
2017-12-31	34985
2018-03-31	35738
2018-06-30	33974
2018-09-30	33647
2018-12-31	35393
2019-03-31	37925
2019-06-30	37728
2019-09-30	38911
2019-12-31	37305
2020-03-31	43608
2020-06-30	42888
2020-09-30	34000
2020-12-31	33421
2021-03-31	32084
2021-06-30	33897
2021-09-30	33513
2021-12-31	33175
2022-03-31	30090
2022-06-30	25592
2022-09-30	26180
2022-12-31	25384
2023-03-31	26832
2023-06-30	27921
2023-09-30	26153