Quarter	US dollars
2004-12-31	1597
2005-03-31	1537
2005-06-30	1581
2005-09-30	1700
2005-12-31	1696
2006-03-31	1643
2006-06-30	1781
2006-09-30	1779
2006-12-31	1828
2007-03-31	1924
2007-06-30	2067
2007-09-30	2123
2007-12-31	2144
2008-03-31	2304
2008-06-30	2402
2008-09-30	2793
2008-12-31	2739
2009-03-31	2567
2009-06-30	2714
2009-09-30	2768
2009-12-31	2983
2010-03-31	3173
2010-06-30	3212
2010-09-30	3458
2010-12-31	3753
2011-03-31	4016
2011-06-30	4195
2011-09-30	4280
2011-12-31	4157
2012-03-31	4315
2012-06-30	4605
2012-09-30	5026
2012-12-31	5437
2013-03-31	5807
2013-06-30	6393
2013-09-30	6528
2013-12-31	6864
2014-03-31	7399
2014-06-30	7447
2014-09-30	7673
2014-12-31	7685
2015-03-31	7689
2015-06-30	7964
2015-09-30	7599
2015-12-31	7568
2016-03-31	7484
2016-06-30	7910
2016-09-30	7906
2016-12-31	7894
2017-03-31	7253
2017-06-30	9067
2017-09-30	9293
2017-12-31	9144
2018-03-31	9587
2018-06-30	9698
2018-09-30	10096
2018-12-31	10379
2019-03-31	10234
2019-06-30	10510
2019-09-30	10418
2019-12-31	10180
2020-03-31	10608
2020-06-30	11223
2020-09-30	10838
2020-12-31	11046
2021-03-31	11478
2021-06-30	11973
2021-09-30	12029
2021-12-31	12428
2022-03-31	12729
2022-06-30	11984
2022-09-30	11858
2022-12-31	11586
2023-03-31	11716
2023-06-30	11804
2023-09-30	10692