Quarter	US dollars
2004-12-31	5706
2005-03-31	6168
2005-06-30	6195
2005-09-30	7222
2005-12-31	7210
2006-03-31	6777
2006-06-30	17623
2006-09-30	17273
2006-12-31	23641
2007-03-31	22633
2007-06-30	28013
2007-09-30	31229
2007-12-31	37335
2008-03-31	35809
2008-06-30	34345
2008-09-30	29802
2008-12-31	20782
2009-03-31	14186
2009-06-30	15841
2009-09-30	18957
2009-12-31	18997
2010-03-31	25822
2010-06-30	25066
2010-09-30	31192
2010-12-31	30590
2011-03-31	32815
2011-06-30	36598
2011-09-30	30033
2011-12-31	30845
2012-03-31	36651
2012-06-30	32472
2012-09-30	35796
2012-12-31	38761
2013-03-31	42121
2013-06-30	38973
2013-09-30	39983
2013-12-31	37937
2014-03-31	36192
2014-06-30	40313
2014-09-30	40131
2014-12-31	39782
2015-03-31	32787
2015-06-30	27905
2015-09-30	26115
2015-12-31	24487
2016-03-31	25993
2016-06-30	28568
2016-09-30	30035
2016-12-31	26695
2017-03-31	33095
2017-06-30	32937
2017-09-30	34644
2017-12-31	36166
2018-03-31	35287
2018-06-30	30927
2018-09-30	28758
2018-12-31	29789
2019-03-31	37408
2019-06-30	41945
2019-09-30	39340
2019-12-31	42499
2020-03-31	35972
2020-06-30	37401
2020-09-30	41203
2020-12-31	50877
2021-03-31	52310
2021-06-30	60151
2021-09-30	56285
2021-12-31	61535
2022-03-31	53531
2022-06-30	53138
2022-09-30	46162
2022-12-31	54174
2023-03-31	56686
2023-06-30	61362
2023-09-30	54310