Quarter	US dollars
2007-06-30	54
2007-09-30	587
2007-12-31	865
2008-03-31	1166
2008-06-30	1178
2008-09-30	1296
2008-12-31	1536
2009-03-31	1442
2009-06-30	1427
2009-09-30	1475
2009-12-31	1420
2010-03-31	1315
2010-06-30	1174
2010-09-30	1253
2010-12-31	1175
2011-03-31	1268
2011-06-30	1196
2011-09-30	1162
2011-12-31	981
2012-03-31	1014
2012-06-30	866
2012-09-30	886
2012-12-31	853
2013-03-31	1108
2013-06-30	1070
2013-09-30	1169
2013-12-31	1173
2014-03-31	1117
2014-06-30	1111
2014-09-30	994
2014-12-31	802
2015-03-31	820
2015-06-30	820
2015-09-30	688
2015-12-31	624
2016-03-31	670
2016-06-30	639
2016-09-30	640
2016-12-31	577
2017-03-31	550
2017-06-30	704
2017-09-30	737
2017-12-31	714
2018-03-31	702
2018-06-30	665
2018-09-30	660
2018-12-31	539
2019-03-31	409
2019-06-30	524
2019-09-30	900
2019-12-31	1065
2020-03-31	700
2020-06-30	817
2020-09-30	934
2020-12-31	868
2021-03-31	847
2021-06-30	681
2021-09-30	628
2021-12-31	587
2022-03-31	567
2022-06-30	305
2022-09-30	413
2022-12-31	462
2023-03-31	430
2023-06-30	468
2023-09-30	480