Quarter	US dollars
2004-12-31	1265
2005-03-31	2446
2005-06-30	1434
2005-09-30	1146
2005-12-31	1361
2006-03-31	2994
2006-06-30	1615
2006-09-30	1721
2006-12-31	2018
2007-03-31	3211
2007-06-30	2759
2007-09-30	3184
2007-12-31	3488
2008-03-31	4859
2008-06-30	3242
2008-09-30	2933
2008-12-31	2727
2009-03-31	2803
2009-06-30	2457
2009-09-30	2327
2009-12-31	2293
2010-03-31	2419
2010-06-30	2449
2010-09-30	2707
2010-12-31	2376
2011-03-31	2483
2011-06-30	2166
2011-09-30	2125
2011-12-31	2151
2012-03-31	2567
2012-06-30	2786
2012-09-30	2639
2012-12-31	2818
2013-03-31	2573
2013-06-30	2239
2013-09-30	2300
2013-12-31	2380
2014-03-31	2664
2014-06-30	2130
2014-09-30	2398
2014-12-31	2265
2015-03-31	2531
2015-06-30	2016
2015-09-30	1719
2015-12-31	1515
2016-03-31	1967
2016-06-30	1603
2016-09-30	1637
2016-12-31	1666
2017-03-31	2112
2017-06-30	1795
2017-09-30	1745
2017-12-31	1471
2018-03-31	1994
2018-06-30	2237
2018-09-30	1918
2018-12-31	2198
2019-03-31	2910
2019-06-30	1832
2019-09-30	1778
2019-12-31	1839
2020-03-31	1682
2020-06-30	2180
2020-09-30	2489
2020-12-31	1979
2021-03-31	1374
2021-06-30	1849
2021-09-30	2032
2021-12-31	1655
2022-03-31	1407
2022-06-30	1194
2022-09-30	1148
2022-12-31	1166
2023-03-31	857
2023-06-30	1171
2023-09-30	749