Quarter	US dollars
2004-12-31	35082
2005-03-31	39443
2005-06-30	42486
2005-09-30	52961
2005-12-31	40433
2006-03-31	44911
2006-06-30	47690
2006-09-30	49980
2006-12-31	56150
2007-03-31	64601
2007-06-30	72086
2007-09-30	68787
2007-12-31	66582
2008-03-31	75406
2008-06-30	81584
2008-09-30	70860
2008-12-31	63098
2009-03-31	61258
2009-06-30	60736
2009-09-30	59436
2009-12-31	49700
2010-03-31	47677
2010-06-30	50272
2010-09-30	56605
2010-12-31	49611
2011-03-31	42988
2011-06-30	42564
2011-09-30	42172
2011-12-31	35522
2012-03-31	37921
2012-06-30	35455
2012-09-30	36653
2012-12-31	42771
2013-03-31	45409
2013-06-30	45669
2013-09-30	52428
2013-12-31	47143
2014-03-31	39073
2014-06-30	40322
2014-09-30	30167
2014-12-31	27398
2015-03-31	29093
2015-06-30	26316
2015-09-30	23463
2015-12-31	17266
2016-03-31	19721
2016-06-30	17616
2016-09-30	18459
2016-12-31	18594
2017-03-31	21074
2017-06-30	21673
2017-09-30	21533
2017-12-31	23198
2018-03-31	20466
2018-06-30	20544
2018-09-30	24310
2018-12-31	19944
2019-03-31	24659
2019-06-30	20602
2019-09-30	21192
2019-12-31	18246
2020-03-31	21126
2020-06-30	20764
2020-09-30	22523
2020-12-31	24163
2021-03-31	20211
2021-06-30	22087
2021-09-30	22282
2021-12-31	20935
2022-03-31	20291
2022-06-30	17110
2022-09-30	18827
2022-12-31	19185
2023-03-31	34090
2023-06-30	37740
2023-09-30	32226