Quarter	US dollars
2004-12-31	1092
2005-03-31	1155
2005-06-30	1246
2005-09-30	1396
2005-12-31	1303
2006-03-31	1306
2006-06-30	1198
2006-09-30	1453
2006-12-31	1309
2007-03-31	1249
2007-06-30	1262
2007-09-30	1497
2007-12-31	1772
2008-03-31	1823
2008-06-30	1570
2008-09-30	1848
2008-12-31	1784
2009-03-31	1866
2009-06-30	1797
2009-09-30	1854
2009-12-31	3822
2010-03-31	2712
2010-06-30	3052
2010-09-30	3047
2010-12-31	3015
2011-03-31	3692
2011-06-30	3568
2011-09-30	3499
2011-12-31	3868
2012-03-31	3927
2012-06-30	4472
2012-09-30	5240
2012-12-31	5326
2013-03-31	6119
2013-06-30	4321
2013-09-30	5465
2013-12-31	2729
2014-03-31	3413
2014-06-30	4283
2014-09-30	4538
2014-12-31	4420
2015-03-31	4093
2015-06-30	4193
2015-09-30	4156
2015-12-31	4012
2016-03-31	3641
2016-06-30	3134
2016-09-30	3666
2016-12-31	3647
2017-03-31	3564
2017-06-30	2815
2017-09-30	2957
2017-12-31	2728
2018-03-31	3118
2018-06-30	3066
2018-09-30	2857
2018-12-31	2604
2019-03-31	2749
2019-06-30	2922
2019-09-30	2770
2019-12-31	2519
2020-03-31	3092
2020-06-30	2885
2020-09-30	2754
2020-12-31	2764
2021-03-31	2656
2021-06-30	2439
2021-09-30	2352
2021-12-31	1904
2022-03-31	2060
2022-06-30	2297
2022-09-30	2651
2022-12-31	2731
2023-03-31	2485
2023-06-30	2657
2023-09-30	2412