Quarter	US dollars
2004-12-31	970
2005-03-31	1042
2005-06-30	1086
2005-09-30	1136
2005-12-31	1059
2006-03-31	968
2006-06-30	1650
2006-09-30	1864
2006-12-31	1798
2007-03-31	1808
2007-06-30	1533
2007-09-30	2204
2007-12-31	2294
2008-03-31	2345
2008-06-30	2500
2008-09-30	2402
2008-12-31	2312
2009-03-31	2132
2009-06-30	2080
2009-09-30	2012
2009-12-31	2086
2010-03-31	2389
2010-06-30	2710
2010-09-30	2941
2010-12-31	3131
2011-03-31	3299
2011-06-30	3587
2011-09-30	3954
2011-12-31	3896
2012-03-31	3989
2012-06-30	3915
2012-09-30	4160
2012-12-31	4283
2013-03-31	4144
2013-06-30	4212
2013-09-30	4031
2013-12-31	3854
2014-03-31	3350
2014-06-30	3337
2014-09-30	3377
2014-12-31	3540
2015-03-31	3501
2015-06-30	3883
2015-09-30	3979
2015-12-31	3016
2016-03-31	2850
2016-06-30	2791
2016-09-30	2858
2016-12-31	2975
2017-03-31	3194
2017-06-30	3512
2017-09-30	3773
2017-12-31	3726
2018-03-31	4206
2018-06-30	3334
2018-09-30	2619
2018-12-31	2509
2019-03-31	2538
2019-06-30	2748
2019-09-30	2202
2019-12-31	2308
2020-03-31	2099
2020-06-30	2016
2020-09-30	1905
2020-12-31	1735
2021-03-31	1731
2021-06-30	1776
2021-09-30	1963
2021-12-31	1989
2022-03-31	2045
2022-06-30	2102
2022-09-30	2132
2022-12-31	2033
2023-03-31	2004
2023-06-30	2098
2023-09-30	1714