Quarter	US dollars
2004-12-31	51651
2005-03-31	53171
2005-06-30	43879
2005-09-30	45154
2005-12-31	41303
2006-03-31	56257
2006-06-30	48402
2006-09-30	54426
2006-12-31	56246
2007-03-31	63132
2007-06-30	58687
2007-09-30	75948
2007-12-31	60109
2008-03-31	72729
2008-06-30	45581
2008-09-30	48956
2008-12-31	22833
2009-03-31	23278
2009-06-30	20672
2009-09-30	17383
2009-12-31	16678
2010-03-31	14410
2010-06-30	13497
2010-09-30	18172
2010-12-31	14365
2011-03-31	12635
2011-06-30	14775
2011-09-30	11027
2011-12-31	8439
2012-03-31	8366
2012-06-30	7904
2012-09-30	10224
2012-12-31	11827
2013-03-31	10771
2013-06-30	8503
2013-09-30	10670
2013-12-31	7795
2014-03-31	10986
2014-06-30	11219
2014-09-30	8647
2014-12-31	6718
2015-03-31	9930
2015-06-30	8497
2015-09-30	8573
2015-12-31	7736
2016-03-31	8903
2016-06-30	10609
2016-09-30	9978
2016-12-31	8718
2017-03-31	11296
2017-06-30	11948
2017-09-30	10310
2017-12-31	10262
2018-03-31	9990
2018-06-30	8480
2018-09-30	9806
2018-12-31	8834
2019-03-31	9939
2019-06-30	4190
2019-09-30	4800
2019-12-31	6251
2020-03-31	6183
2020-06-30	5662
2020-09-30	5197
2020-12-31	6049
2021-03-31	6417
2021-06-30	8005
2021-09-30	8365
2021-12-31	8676
2022-03-31	8615
2022-06-30	7619
2022-09-30	7832
2022-12-31	8381
2023-03-31	9522
2023-06-30	9485
2023-09-30	9812