Quarter	US dollars
2004-12-31	2281
2005-03-31	1616
2005-06-30	1502
2005-09-30	1794
2005-12-31	1478
2006-03-31	1930
2006-06-30	2238
2006-09-30	2559
2006-12-31	2618
2007-03-31	3991
2007-06-30	4282
2007-09-30	4655
2007-12-31	12230
2008-03-31	26865
2008-06-30	27841
2008-09-30	25081
2008-12-31	12798
2009-03-31	13584
2009-06-30	13652
2009-09-30	12742
2009-12-31	5364
2010-03-31	5163
2010-06-30	9954
2010-09-30	16092
2010-12-31	22551
2011-03-31	21308
2011-06-30	24327
2011-09-30	23703
2011-12-31	20965
2012-03-31	30202
2012-06-30	28906
2012-09-30	28543
2012-12-31	32082
2013-03-31	49807
2013-06-30	45540
2013-09-30	44203
2013-12-31	42130
2014-03-31	34093
2014-06-30	36794
2014-09-30	32531
2014-12-31	23023
2015-03-31	19804
2015-06-30	19900
2015-09-30	19211
2015-12-31	17907
2016-03-31	19333
2016-06-30	17389
2016-09-30	17170
2016-12-31	15498
2017-03-31	15945
2017-06-30	12283
2017-09-30	12505
2017-12-31	13468
2018-03-31	9284
2018-06-30	8445
2018-09-30	8104
2018-12-31	8345
2019-03-31	8932
2019-06-30	9252
2019-09-30	9215
2019-12-31	9036
2020-03-31	9522
2020-06-30	10038
2020-09-30	10070
2020-12-31	9673
2021-03-31	10903
2021-06-30	9825
2021-09-30	10422
2021-12-31	11435
2022-03-31	12014
2022-06-30	13821
2022-09-30	14348
2022-12-31	12457
2023-03-31	13135
2023-06-30	10789
2023-09-30	11086