Quarter	US dollars
1999-03-31	809
1999-06-30	799
1999-09-30	864
1999-12-31	827
2000-03-31	749
2000-06-30	589
2000-09-30	549
2000-12-31	613
2001-03-31	572
2001-06-30	590
2001-09-30	638
2001-12-31	771
2002-03-31	778
2002-06-30	1398
2002-09-30	936
2002-12-31	1087
2003-03-31	1084
2003-06-30	967
2003-09-30	1222
2003-12-31	1374
2004-03-31	1168
2004-06-30	1081
2004-09-30	1043
2004-12-31	755
2005-03-31	723
2005-06-30	573
2005-09-30	584
2005-12-31	535
2006-03-31	382
2006-06-30	897
2006-09-30	1354
2006-12-31	1988
2007-03-31	1638
2007-06-30	2102
2007-09-30	2550
2007-12-31	3095
2008-03-31	3590
2008-06-30	3287
2008-09-30	2925
2008-12-31	3793
2009-03-31	2343
2009-06-30	2079
2009-09-30	1943
2009-12-31	2191
2010-03-31	1816
2010-06-30	2723
2010-09-30	2332
2010-12-31	2425
2011-03-31	2064
2011-06-30	2389
2011-09-30	1869
2011-12-31	2378
2012-03-31	1488
2012-06-30	3560
2012-09-30	2228
2012-12-31	1036
2013-03-31	1718
2013-06-30	786
2013-09-30	991
2013-12-31	1602
2014-03-31	912
2014-06-30	1071
2014-09-30	880
2014-12-31	1212
2015-03-31	1382
2015-06-30	1131
2015-09-30	952
2015-12-31	956
2016-03-31	1869
2016-06-30	1184
2016-09-30	1082
2016-12-31	945
2017-03-31	1142
2017-06-30	1102
2017-09-30	1142
2017-12-31	1404
2018-03-31	1358
2018-06-30	1263
2018-09-30	2063
2018-12-31	1287
2019-03-31	557
2019-06-30	562
2019-09-30	584
2019-12-31	498
2020-03-31	763
2020-06-30	536
2020-09-30	627
2020-12-31	547
2021-03-31	363
2021-06-30	351
2021-09-30	337
2021-12-31	302
2022-03-31	235
2022-06-30	234
2022-09-30	193
2022-12-31	174
2023-03-31	128
2023-06-30	151
2023-09-30	92