Quarter	US dollars
2004-12-31	1666
2005-03-31	1446
2005-06-30	862
2005-09-30	164
2005-12-31	221
2006-03-31	468
2006-06-30	329
2006-09-30	736
2006-12-31	1104
2007-03-31	830
2007-06-30	787
2007-09-30	1006
2007-12-31	1368
2008-03-31	1795
2008-06-30	3391
2008-09-30	4696
2008-12-31	1190
2009-03-31	1277
2009-06-30	2699
2009-09-30	3944
2009-12-31	4176
2010-03-31	6249
2010-06-30	5162
2010-09-30	5237
2010-12-31	5642
2011-03-31	9602
2011-06-30	6946
2011-09-30	5598
2011-12-31	5189
2012-03-31	4961
2012-06-30	6574
2012-09-30	8615
2012-12-31	8487
2013-03-31	7603
2013-06-30	5565
2013-09-30	5485
2013-12-31	5395
2014-03-31	5639
2014-06-30	3845
2014-09-30	4783
2014-12-31	4617
2015-03-31	5315
2015-06-30	6177
2015-09-30	5292
2015-12-31	6559
2016-03-31	7971
2016-06-30	7781
2016-09-30	7509
2016-12-31	7577
2017-03-31	8541
2017-06-30	7209
2017-09-30	8102
2017-12-31	9173
2018-03-31	9763
2018-06-30	10062
2018-09-30	10390
2018-12-31	10734
2019-03-31	10707
2019-06-30	12056
2019-09-30	12977
2019-12-31	12810
2020-03-31	10855
2020-06-30	14830
2020-09-30	14421
2020-12-31	17955
2021-03-31	18266
2021-06-30	15361
2021-09-30	15751
2021-12-31	16269
2022-03-31	17488
2022-06-30	15791
2022-09-30	12066
2022-12-31	12521
2023-03-31	13291
2023-06-30	13522
2023-09-30	13182