Quarter	US dollars
1999-03-31	1955
1999-06-30	1984
1999-09-30	1619
1999-12-31	1313
2000-03-31	1369
2000-06-30	1807
2000-09-30	1956
2000-12-31	1854
2001-03-31	1832
2001-06-30	1894
2001-09-30	1705
2001-12-31	1483
2002-03-31	1777
2002-06-30	1521
2002-09-30	1620
2002-12-31	1567
2003-03-31	1559
2003-06-30	1632
2003-09-30	1736
2003-12-31	1656
2004-03-31	1597
2004-06-30	1626
2004-09-30	1719
2004-12-31	1648
2005-03-31	1429
2005-06-30	1765
2005-09-30	1892
2005-12-31	2090
2006-03-31	2024
2006-06-30	2082
2006-09-30	2587
2006-12-31	2771
2007-03-31	2816
2007-06-30	2944
2007-09-30	3119
2007-12-31	3263
2008-03-31	3563
2008-06-30	4027
2008-09-30	4360
2008-12-31	3758
2009-03-31	3343
2009-06-30	3221
2009-09-30	3125
2009-12-31	2804
2010-03-31	3112
2010-06-30	5213
2010-09-30	2230
2010-12-31	3994
2011-03-31	3921
2011-06-30	3654
2011-09-30	3458
2011-12-31	2987
2012-03-31	1912
2012-06-30	2019
2012-09-30	2192
2012-12-31	1588
2013-03-31	1906
2013-06-30	1449
2013-09-30	1658
2013-12-31	1904
2014-03-31	2366
2014-06-30	2160
2014-09-30	2291
2014-12-31	2519
2015-03-31	2551
2015-06-30	2576
2015-09-30	2937
2015-12-31	2264
2016-03-31	2252
2016-06-30	2137
2016-09-30	2672
2016-12-31	3705
2017-03-31	3476
2017-06-30	2731
2017-09-30	3265
2017-12-31	3837
2018-03-31	3047
2018-06-30	2389
2018-09-30	3513
2018-12-31	2940
2019-03-31	2596
2019-06-30	3166
2019-09-30	2779
2019-12-31	2913
2020-03-31	2433
2020-06-30	2645
2020-09-30	2983
2020-12-31	2470
2021-03-31	2963
2021-06-30	3177
2021-09-30	2946
2021-12-31	2465
2022-03-31	2659
2022-06-30	2475
2022-09-30	2377
2022-12-31	1961
2023-03-31	1683
2023-06-30	1842
2023-09-30	1504