Quarter	US dollars
2004-12-31	1233
2005-03-31	1248
2005-06-30	1809
2005-09-30	1990
2005-12-31	1390
2006-03-31	1665
2006-06-30	1259
2006-09-30	1672
2006-12-31	1090
2007-03-31	2230
2007-06-30	2986
2007-09-30	4564
2007-12-31	9775
2008-03-31	8153
2008-06-30	8703
2008-09-30	7930
2008-12-31	8183
2009-03-31	9029
2009-06-30	8667
2009-09-30	8289
2009-12-31	7733
2010-03-31	8233
2010-06-30	7195
2010-09-30	7071
2010-12-31	8981
2011-03-31	10575
2011-06-30	11750
2011-09-30	11743
2011-12-31	11079
2012-03-31	12312
2012-06-30	14671
2012-09-30	15929
2012-12-31	15408
2013-03-31	12155
2013-06-30	12005
2013-09-30	14746
2013-12-31	11391
2014-03-31	12665
2014-06-30	11159
2014-09-30	10629
2014-12-31	10698
2015-03-31	10032
2015-06-30	9548
2015-09-30	8066
2015-12-31	7624
2016-03-31	9295
2016-06-30	9188
2016-09-30	7770
2016-12-31	7223
2017-03-31	7004
2017-06-30	11536
2017-09-30	8258
2017-12-31	9456
2018-03-31	9418
2018-06-30	7615
2018-09-30	8349
2018-12-31	8678
2019-03-31	10543
2019-06-30	11514
2019-09-30	11286
2019-12-31	13287
2020-03-31	14156
2020-06-30	13151
2020-09-30	11855
2020-12-31	13392
2021-03-31	12691
2021-06-30	12845
2021-09-30	13253
2021-12-31	14946
2022-03-31	14801
2022-06-30	12835
2022-09-30	10569
2022-12-31	11084
2023-03-31	12500
2023-06-30	12664
2023-09-30	13155