Quarter	US dollars
2004-12-31	2521
2005-03-31	2272
2005-06-30	2155
2005-09-30	2078
2005-12-31	2669
2006-03-31	2591
2006-06-30	2613
2006-09-30	2642
2006-12-31	3002
2007-03-31	3050
2007-06-30	2921
2007-09-30	3085
2007-12-31	2499
2008-03-31	2924
2008-06-30	2667
2008-09-30	2424
2008-12-31	2069
2009-03-31	3627
2009-06-30	3587
2009-09-30	3461
2009-12-31	4362
2010-03-31	4377
2010-06-30	4728
2010-09-30	4556
2010-12-31	4534
2011-03-31	4641
2011-06-30	4443
2011-09-30	4463
2011-12-31	4570
2012-03-31	4839
2012-06-30	5046
2012-09-30	4924
2012-12-31	4522
2013-03-31	4712
2013-06-30	4404
2013-09-30	5143
2013-12-31	2975
2014-03-31	2451
2014-06-30	2611
2014-09-30	2323
2014-12-31	2046
2015-03-31	2267
2015-06-30	2400
2015-09-30	2767
2015-12-31	2527
2016-03-31	2759
2016-06-30	2726
2016-09-30	2601
2016-12-31	3246
2017-03-31	2689
2017-06-30	2947
2017-09-30	3110
2017-12-31	2852
2018-03-31	2199
2018-06-30	2408
2018-09-30	2345
2018-12-31	1877
2019-03-31	2073
2019-06-30	1882
2019-09-30	1664
2019-12-31	1748
2020-03-31	1821
2020-06-30	2021
2020-09-30	1663
2020-12-31	1688
2021-03-31	1524
2021-06-30	1649
2021-09-30	1534
2021-12-31	1778
2022-03-31	1795
2022-06-30	1693
2022-09-30	1926
2022-12-31	1822
2023-03-31	1950
2023-06-30	1740
2023-09-30	1840