Quarter	US dollars
2004-12-31	1355
2005-03-31	1244
2005-06-30	1316
2005-09-30	1484
2005-12-31	1526
2006-03-31	1486
2006-06-30	1583
2006-09-30	1612
2006-12-31	1642
2007-03-31	1751
2007-06-30	1876
2007-09-30	1938
2007-12-31	1935
2008-03-31	2055
2008-06-30	2165
2008-09-30	2497
2008-12-31	2453
2009-03-31	2376
2009-06-30	2485
2009-09-30	2530
2009-12-31	2663
2010-03-31	2853
2010-06-30	2894
2010-09-30	3159
2010-12-31	3272
2011-03-31	3418
2011-06-30	3483
2011-09-30	3658
2011-12-31	3445
2012-03-31	3808
2012-06-30	4047
2012-09-30	4229
2014-03-31	6416
2014-06-30	6413
2014-09-30	6457
2014-12-31	6455
2015-03-31	6436
2015-06-30	6776
2015-09-30	6489
2015-12-31	6436
2016-03-31	6502
2016-06-30	6705
2016-09-30	6655
2016-12-31	6706
2017-03-31	5971
2017-06-30	7232
2017-09-30	7517
2017-12-31	7416
2018-03-31	7736
2018-06-30	7836
2018-09-30	8151
2018-12-31	8707
2019-03-31	8596
2019-06-30	8852
2019-09-30	8695
2019-12-31	8610
2020-03-31	9131
2020-06-30	9760
2020-09-30	9401
2020-12-31	9558
2021-03-31	9958
2021-06-30	10247
2021-09-30	10078
2021-12-31	10424
2022-03-31	10656
2022-06-30	9968
2022-09-30	9708
2022-12-31	9315
2023-03-31	9365
2023-06-30	9575
2023-09-30	8734