Quarter	US dollars
2004-12-31	1421
2005-03-31	1009
2005-06-30	1052
2005-09-30	1130
2005-12-31	1123
2006-03-31	1084
2006-06-30	1208
2006-09-30	1143
2006-12-31	1284
2007-03-31	1375
2007-06-30	1870
2007-09-30	2064
2007-12-31	1555
2008-03-31	2117
2008-06-30	2705
2008-09-30	2475
2008-12-31	1725
2009-03-31	2273
2009-06-30	2059
2009-09-30	1601
2009-12-31	2458
2010-03-31	2360
2010-06-30	4144
2010-09-30	4350
2010-12-31	3668
2011-03-31	3209
2011-06-30	2421
2011-09-30	2248
2011-12-31	2078
2012-03-31	2114
2012-06-30	1918
2012-09-30	2615
2012-12-31	1853
2013-03-31	1618
2013-06-30	1583
2013-09-30	1216
2013-12-31	1221
2014-03-31	1727
2014-06-30	1351
2014-09-30	1135
2014-12-31	1066
2015-03-31	952
2015-06-30	1022
2015-09-30	1150
2015-12-31	999
2016-03-31	1008
2016-06-30	1308
2016-09-30	1450
2016-12-31	1186
2017-03-31	1061
2017-06-30	1334
2017-09-30	1269
2017-12-31	1614
2018-03-31	1969
2018-06-30	2171
2018-09-30	1618
2018-12-31	1489
2019-03-31	1390
2019-06-30	871
2019-09-30	1185
2019-12-31	1159
2020-03-31	1119
2020-06-30	1132
2020-09-30	1237
2020-12-31	1222
2021-03-31	1022
2021-06-30	966
2021-09-30	836
2021-12-31	643
2022-03-31	658
2022-06-30	642
2022-09-30	565
2022-12-31	506
2023-03-31	854
2023-06-30	938
2023-09-30	866