Quarter	US dollars
2004-12-31	1547
2005-03-31	1161
2005-06-30	1133
2005-09-30	1128
2005-12-31	1478
2006-03-31	1238
2006-06-30	1302
2006-09-30	1304
2006-12-31	1571
2007-03-31	1573
2007-06-30	1555
2007-09-30	1532
2007-12-31	1392
2008-03-31	1501
2008-06-30	1503
2008-09-30	1362
2008-12-31	1003
2009-03-31	954
2009-06-30	909
2009-09-30	830
2009-12-31	1105
2010-03-31	1080
2010-06-30	1188
2010-09-30	1030
2010-12-31	1039
2011-03-31	1159
2011-06-30	930
2011-09-30	921
2011-12-31	934
2012-03-31	1168
2012-06-30	1118
2012-09-30	1046
2012-12-31	834
2013-03-31	829
2013-06-30	646
2013-09-30	640
2013-12-31	616
2014-03-31	694
2014-06-30	887
2014-09-30	673
2014-12-31	573
2015-03-31	555
2015-06-30	659
2015-09-30	626
2015-12-31	599
2016-03-31	692
2016-06-30	657
2016-09-30	566
2016-12-31	651
2017-03-31	564
2017-06-30	601
2017-09-30	649
2017-12-31	581
2018-03-31	591
2018-06-30	597
2018-09-30	505
2018-12-31	457
2019-03-31	502
2019-06-30	368
2019-09-30	283
2019-12-31	333
2020-03-31	316
2020-06-30	251
2020-09-30	240
2020-12-31	273
2021-03-31	217
2021-06-30	229
2021-09-30	202
2021-12-31	204
2022-03-31	221
2022-06-30	225
2022-09-30	275
2022-12-31	281
2023-03-31	219
2023-06-30	192
2023-09-30	251