Quarter	US dollars
2004-12-31	551
2005-03-31	794
2005-06-30	719
2005-09-30	812
2005-12-31	870
2006-03-31	949
2006-06-30	988
2006-09-30	1035
2006-12-31	1139
2007-03-31	1185
2007-06-30	1340
2007-09-30	1497
2007-12-31	1445
2008-03-31	1598
2008-06-30	1552
2008-09-30	1420
2008-12-31	1518
2009-03-31	1208
2009-06-30	1176
2009-09-30	1270
2009-12-31	1487
2010-03-31	1608
2010-06-30	1507
2010-09-30	1599
2010-12-31	1794
2011-03-31	1722
2011-06-30	1928
2011-09-30	2011
2011-12-31	2011
2012-03-31	1841
2012-06-30	1653
2012-09-30	1944
2012-12-31	1971
2013-03-31	2177
2013-06-30	2107
2013-09-30	2196
2013-12-31	2003
2014-03-31	2031
2014-06-30	1646
2014-09-30	1537
2014-12-31	1437
2015-03-31	1247
2015-06-30	1103
2015-09-30	1615
2015-12-31	1532
2016-03-31	1464
2016-06-30	1583
2016-09-30	1781
2016-12-31	1859
2017-03-31	1887
2017-06-30	1028
2017-09-30	1012
2017-12-31	963
2018-03-31	1194
2018-06-30	1211
2018-09-30	1210
2018-12-31	1180
2019-03-31	1169
2019-06-30	1254
2019-09-30	1404
2019-12-31	1236
2020-03-31	1388
2020-06-30	1332
2020-09-30	1344
2020-12-31	1302
2021-03-31	1425
2021-06-30	1459
2021-09-30	1629
2021-12-31	1480
2022-03-31	1058
2022-06-30	939
2022-09-30	911
2022-12-31	586
2023-03-31	645
2023-06-30	612
2023-09-30	545