Quarter	US dollars
2004-12-31	349
2005-03-31	550
2005-06-30	427
2005-09-30	623
2005-12-31	807
2006-03-31	973
2006-06-30	1189
2006-09-30	1470
2006-12-31	1990
2007-03-31	1928
2007-06-30	2309
2007-09-30	2056
2007-12-31	2168
2008-03-31	1671
2008-06-30	1300
2008-09-30	1269
2008-12-31	528
2009-03-31	794
2009-06-30	700
2009-09-30	1241
2009-12-31	1287
2010-03-31	1571
2010-06-30	1575
2010-09-30	2199
2010-12-31	2442
2011-03-31	2573
2011-06-30	3006
2011-09-30	2700
2011-12-31	2665
2012-03-31	2507
2012-06-30	2916
2012-09-30	3768
2012-12-31	5969
2013-03-31	4343
2013-06-30	3678
2013-09-30	1947
2013-12-31	1714
2014-03-31	667
2014-06-30	1099
2014-09-30	1109
2014-12-31	2397
2015-03-31	1546
2015-06-30	897
2015-09-30	959
2015-12-31	680
2016-03-31	1515
2016-06-30	1411
2016-09-30	2146
2016-12-31	1470
2017-03-31	1483
2017-06-30	2330
2017-09-30	2750
2017-12-31	2228
2018-03-31	2384
2018-06-30	1617
2018-09-30	1978
2018-12-31	1705
2019-03-31	2583
2019-06-30	2384
2019-09-30	1825
2019-12-31	1589
2020-03-31	1590
2020-06-30	1156
2020-09-30	1057
2020-12-31	1432
2021-03-31	908
2021-06-30	405
2021-09-30	640
2021-12-31	-32
2022-03-31	-130
2022-06-30	-93
2022-09-30	-303
2022-12-31	363
2023-03-31	365
2023-06-30	230
2023-09-30	150