Quarter	US dollars
2004-12-31	1703
2005-03-31	1493
2005-06-30	1224
2005-09-30	1088
2005-12-31	1052
2006-03-31	1067
2006-06-30	766
2006-09-30	914
2006-12-31	2037
2007-03-31	2336
2007-06-30	2596
2007-09-30	2510
2007-12-31	2272
2008-03-31	2290
2008-06-30	3769
2008-09-30	2746
2008-12-31	1596
2009-03-31	1359
2009-06-30	1403
2009-09-30	1479
2009-12-31	1603
2010-03-31	1442
2010-06-30	1598
2010-09-30	1385
2010-12-31	1277
2011-03-31	952
2011-06-30	997
2011-09-30	1318
2011-12-31	1019
2012-03-31	1143
2012-06-30	996
2012-09-30	1137
2012-12-31	1072
2013-03-31	1055
2013-06-30	1178
2013-09-30	2332
2013-12-31	1939
2014-03-31	1861
2014-06-30	1823
2014-09-30	1506
2014-12-31	1328
2015-03-31	1185
2015-06-30	1228
2015-09-30	1109
2015-12-31	2467
2016-03-31	2395
2016-06-30	1677
2016-09-30	1564
2016-12-31	2977
2017-03-31	2920
2017-06-30	2306
2017-09-30	2250
2017-12-31	2039
2018-03-31	3026
2018-06-30	2652
2018-09-30	1877
2018-12-31	1739
2019-03-31	1720
2019-06-30	2445
2019-09-30	1945
2019-12-31	1982
2020-03-31	1725
2020-06-30	978
2020-09-30	1652
2020-12-31	1048
2021-03-31	1380
2021-06-30	557
2021-09-30	561
2021-12-31	360
2022-03-31	257
2022-06-30	367
2022-09-30	274
2022-12-31	233
2023-03-31	294
2023-06-30	408
2023-09-30	439