Quarter	US dollars
1999-03-31	684
1999-06-30	509
1999-09-30	454
1999-12-31	1008
2000-03-31	557
2000-06-30	448
2000-09-30	631
2000-12-31	829
2001-03-31	597
2001-06-30	1214
2001-09-30	841
2001-12-31	584
2002-03-31	594
2002-06-30	893
2002-09-30	699
2002-12-31	662
2003-03-31	1063
2003-06-30	950
2003-09-30	661
2003-12-31	545
2004-03-31	755
2004-06-30	908
2004-09-30	600
2004-12-31	976
2005-03-31	771
2005-06-30	531
2005-09-30	734
2005-12-31	1276
2006-03-31	1220
2006-06-30	1902
2006-09-30	1496
2006-12-31	1650
2007-03-31	2570
2007-06-30	834
2007-09-30	1262
2007-12-31	1562
2008-03-31	1408
2008-06-30	1187
2008-09-30	2399
2008-12-31	1695
2009-03-31	1538
2009-06-30	1678
2009-09-30	1490
2009-12-31	1152
2010-03-31	1545
2010-06-30	1339
2010-09-30	1708
2010-12-31	1359
2011-03-31	1357
2011-06-30	1671
2011-09-30	1892
2011-12-31	1083
2012-03-31	1900
2012-06-30	1260
2012-09-30	1762
2012-12-31	1229
2013-03-31	1944
2013-06-30	1589
2013-09-30	2099
2013-12-31	1900
2014-03-31	1765
2014-06-30	1647
2014-09-30	1376
2014-12-31	1057
2015-03-31	1443
2015-06-30	1410
2015-09-30	1699
2015-12-31	1396
2016-03-31	1216
2016-06-30	1210
2016-09-30	925
2016-12-31	467
2017-03-31	906
2017-06-30	968
2017-09-30	535
2017-12-31	120
2018-03-31	732
2018-06-30	929
2018-09-30	607
2018-12-31	380
2019-03-31	859
2019-06-30	1113
2019-09-30	435
2019-12-31	324
2020-03-31	335
2020-06-30	303
2020-09-30	363
2020-12-31	207
2021-03-31	143
2021-06-30	14774
2021-09-30	14548
2021-12-31	14154
2022-03-31	15633
2022-06-30	15845
2022-09-30	14598
2022-12-31	15276
2023-03-31	14871
2023-06-30	15455
2023-09-30	15071