Quarter	US dollars
1999-03-31	2058
1999-06-30	1972
1999-09-30	1910
1999-12-31	1770
2000-03-31	2402
2000-06-30	1481
2000-09-30	2195
2000-12-31	1416
2001-03-31	1181
2001-06-30	1289
2001-09-30	1265
2001-12-31	1026
2002-03-31	1307
2002-06-30	1349
2002-09-30	1174
2002-12-31	930
2003-03-31	995
2003-06-30	1308
2003-09-30	954
2003-12-31	488
2004-03-31	795
2004-06-30	504
2004-09-30	1267
2004-12-31	968
2005-03-31	1016
2005-06-30	1046
2005-09-30	1231
2005-12-31	1833
2006-03-31	2238
2006-06-30	3401
2006-09-30	2131
2006-12-31	2669
2007-03-31	3219
2007-06-30	2692
2007-09-30	2580
2007-12-31	4269
2008-03-31	2782
2008-06-30	1567
2008-09-30	1009
2008-12-31	731
2009-03-31	842
2009-06-30	1124
2009-09-30	1213
2009-12-31	1293
2010-03-31	1020
2010-06-30	1959
2010-09-30	1096
2010-12-31	1520
2011-03-31	1199
2011-06-30	1307
2011-09-30	1718
2011-12-31	598
2012-03-31	481
2012-06-30	309
2012-09-30	230
2012-12-31	555
2013-03-31	1099
2013-06-30	966
2013-09-30	1193
2013-12-31	1235
2014-03-31	392
2014-06-30	1568
2014-09-30	2321
2014-12-31	1948
2015-03-31	2659
2015-06-30	2260
2015-09-30	1387
2015-12-31	1238
2016-03-31	2319
2016-06-30	2213
2016-09-30	2071
2016-12-31	1815
2017-03-31	1482
2017-06-30	1272
2017-09-30	1375
2017-12-31	1780
2018-03-31	1708
2018-06-30	1840
2018-09-30	1278
2018-12-31	2282
2019-03-31	1515
2019-06-30	1140
2019-09-30	1498
2019-12-31	708
2020-03-31	921
2020-06-30	1103
2020-09-30	1063
2020-12-31	1544
2021-03-31	1749
2021-06-30	1715
2021-09-30	1805
2021-12-31	1629
2022-03-31	1064
2022-06-30	945
2022-09-30	1264
2022-12-31	1578
2023-03-31	1653
2023-06-30	1167
2023-09-30	2283