Quarter	US dollars
1999-03-31	464
1999-06-30	533
1999-09-30	554
1999-12-31	579
2000-03-31	559
2000-06-30	1353
2000-09-30	1421
2000-12-31	964
2001-03-31	1295
2001-06-30	1710
2001-09-30	1729
2001-12-31	1492
2002-03-31	2141
2002-06-30	1852
2002-09-30	1727
2002-12-31	1393
2003-03-31	1758
2003-06-30	1049
2003-09-30	1951
2003-12-31	1521
2004-03-31	1967
2004-06-30	2096
2004-09-30	2102
2004-12-31	2146
2005-03-31	2312
2005-06-30	2507
2005-09-30	1976
2005-12-31	2634
2006-03-31	3201
2006-06-30	3109
2006-09-30	2998
2006-12-31	2918
2007-03-31	3072
2007-06-30	2977
2007-09-30	3641
2007-12-31	3410
2008-03-31	665
2008-06-30	4191
2008-09-30	3974
2008-12-31	3461
2009-03-31	5578
2009-06-30	3887
2009-09-30	2659
2009-12-31	2468
2010-03-31	3543
2010-06-30	2700
2010-09-30	3012
2010-12-31	4312
2011-03-31	4557
2011-06-30	4334
2011-09-30	2423
2011-12-31	2300
2012-03-31	2626
2012-06-30	2627
2012-09-30	3288
2012-12-31	2175
2013-03-31	3018
2013-06-30	1719
2013-09-30	3368
2013-12-31	2310
2014-03-31	3349
2014-06-30	1556
2014-09-30	2359
2014-12-31	2307
2015-03-31	2241
2015-06-30	1397
2015-09-30	1222
2015-12-31	853
2016-03-31	799
2016-06-30	676
2016-09-30	890
2016-12-31	1039
2017-03-31	1002
2017-06-30	986
2017-09-30	971
2017-12-31	1111
2018-03-31	906
2018-06-30	839
2018-09-30	834
2018-12-31	806
2019-03-31	773
2019-06-30	778
2019-09-30	724
2019-12-31	642
2020-03-31	620
2020-06-30	506
2020-09-30	516
2020-12-31	539
2021-03-31	558
2021-06-30	695
2021-09-30	679
2021-12-31	652
2022-03-31	652
2022-06-30	708
2022-09-30	856
2022-12-31	711
2023-03-31	746
2023-06-30	743
2023-09-30	732