Quarter	US dollars
2004-12-31	1146
2005-03-31	1125
2005-06-30	1244
2005-09-30	1274
2005-12-31	1289
2006-03-31	1297
2006-06-30	1441
2006-09-30	1457
2006-12-31	1542
2007-03-31	1559
2007-06-30	1782
2007-09-30	1781
2007-12-31	1846
2008-03-31	2039
2008-06-30	2141
2008-09-30	2486
2008-12-31	2451
2009-03-31	2317
2009-06-30	2416
2009-09-30	2252
2009-12-31	2492
2010-03-31	2553
2010-06-30	2823
2010-09-30	3030
2010-12-31	3239
2011-03-31	3336
2011-06-30	3462
2011-09-30	3491
2011-12-31	3375
2012-03-31	3628
2012-06-30	3950
2012-09-30	3968
2012-12-31	4451
2013-03-31	4647
2013-06-30	4984
2013-09-30	4923
2013-12-31	4775
2014-03-31	5127
2014-06-30	5054
2014-09-30	5214
2014-12-31	5341
2015-03-31	5220
2015-06-30	5642
2015-09-30	5303
2015-12-31	5293
2016-03-31	5170
2016-06-30	5878
2016-09-30	5833
2016-12-31	6161
2017-03-31	5350
2017-06-30	6192
2017-09-30	6264
2017-12-31	6215
2018-03-31	6464
2018-06-30	6756
2018-09-30	6921
2018-12-31	7216
2019-03-31	7402
2019-06-30	7666
2019-09-30	7179
2019-12-31	7256
2020-03-31	7568
2020-06-30	7388
2020-09-30	6978
2020-12-31	7081
2021-03-31	7313
2021-06-30	7748
2021-09-30	7829
2021-12-31	7896
2022-03-31	8033
2022-06-30	7788
2022-09-30	7256
2022-12-31	7634
2023-03-31	7445
2023-06-30	7655
2023-09-30	7079