Quarter	US dollars
2004-12-31	1177
2005-03-31	1244
2005-06-30	1221
2005-09-30	1434
2005-12-31	1808
2006-03-31	1878
2006-06-30	2604
2006-09-30	2586
2006-12-31	3292
2007-03-31	3283
2007-06-30	3718
2007-09-30	3733
2007-12-31	4571
2008-03-31	3599
2008-06-30	3361
2008-09-30	3163
2008-12-31	2447
2009-03-31	3024
2009-06-30	2719
2009-09-30	2997
2009-12-31	2650
2010-03-31	3792
2010-06-30	4086
2010-09-30	4991
2010-12-31	5024
2011-03-31	5638
2011-06-30	6567
2011-09-30	5756
2011-12-31	5048
2012-03-31	5788
2012-06-30	7140
2012-09-30	8378
2012-12-31	10637
2013-03-31	8536
2013-06-30	7430
2013-09-30	5697
2013-12-31	4816
2014-03-31	3116
2014-06-30	2694
2014-09-30	2779
2014-12-31	3771
2015-03-31	3007
2015-06-30	2290
2015-09-30	2430
2015-12-31	2287
2016-03-31	2436
2016-06-30	2534
2016-09-30	4279
2016-12-31	1809
2017-03-31	2212
2017-06-30	2742
2017-09-30	3074
2017-12-31	2814
2018-03-31	2519
2018-06-30	2248
2018-09-30	2694
2018-12-31	2943
2019-03-31	3523
2019-06-30	3456
2019-09-30	2953
2019-12-31	2956
2020-03-31	2679
2020-06-30	3014
2020-09-30	3342
2020-12-31	4003
2021-03-31	3326
2021-06-30	2562
2021-09-30	2693
2021-12-31	1873
2022-03-31	1561
2022-06-30	1574
2022-09-30	1336
2022-12-31	1731
2023-03-31	2409
2023-06-30	2080
2023-09-30	2087