Quarter	US dollars
2004-12-31	24529
2005-03-31	35458
2005-06-30	27834
2005-09-30	36193
2005-12-31	28557
2006-03-31	35077
2006-06-30	35956
2006-09-30	33078
2006-12-31	36081
2007-03-31	35225
2007-06-30	32730
2007-09-30	35390
2007-12-31	23751
2008-03-31	24025
2008-06-30	23587
2008-09-30	19033
2008-12-31	15982
2009-03-31	10294
2009-06-30	11850
2009-09-30	8970
2009-12-31	13962
2010-03-31	15331
2010-06-30	17904
2010-09-30	17283
2010-12-31	24821
2011-03-31	34599
2011-06-30	25139
2011-09-30	22907
2011-12-31	26658
2012-03-31	29769
2012-06-30	10270
2012-09-30	11330
2012-12-31	9232
2013-03-31	11744
2013-06-30	6411
2013-09-30	6074
2013-12-31	4859
2014-03-31	5782
2014-06-30	8124
2014-09-30	7184
2014-12-31	5959
2015-03-31	6742
2015-06-30	5873
2015-09-30	11460
2015-12-31	8373
2016-03-31	8069
2016-06-30	10963
2016-09-30	7376
2016-12-31	9844
2017-03-31	9932
2017-06-30	8688
2017-09-30	4696
2017-12-31	6181
2018-03-31	8484
2018-06-30	7969
2018-09-30	8104
2018-12-31	5958
2019-03-31	3129
2019-06-30	2193
2019-09-30	2389
2019-12-31	1711
2020-03-31	2587
2020-06-30	2104
2020-09-30	2002
2020-12-31	1860
2021-03-31	2941
2021-06-30	3057
2021-09-30	2883
2021-12-31	2493
2022-03-31	3177
2022-06-30	3227
2022-09-30	2528
2022-12-31	2428
2023-03-31	3085
2023-06-30	3074
2023-09-30	2000