Quarter	US dollars
1999-03-31	283526
1999-06-30	292132
1999-09-30	305857
1999-12-31	316445
2000-03-31	332419
2000-06-30	334915
2000-09-30	333532
2000-12-31	349228
2001-03-31	391829
2001-06-30	374567
2001-09-30	411473
2001-12-31	440333
2002-03-31	481887
2002-06-30	501896
2002-09-30	540940
2002-12-31	584550
2003-03-31	629399
2003-06-30	664683
2003-09-30	681129
2003-12-31	699231
2004-03-31	816977
2004-06-30	787808
2004-09-30	894478
2004-12-31	875803
2005-03-31	986016
2005-06-30	898338
2005-09-30	1023378
2005-12-31	944941
2006-03-31	1102669
2006-06-30	1098593
2006-09-30	1191051
2006-12-31	1208279
2007-03-31	1426519
2007-06-30	1447704
2007-09-30	1774330
2007-12-31	1751873
2008-03-31	2051727
2008-06-30	1831447
2008-09-30	2039638
2008-12-31	1538840
2009-03-31	1450428
2009-06-30	1495893
2009-09-30	1494362
2009-12-31	1490771
2010-03-31	1552352
2010-06-30	1584251
2010-09-30	1674952
2010-12-31	1660997
2011-03-31	1810074
2011-06-30	1769611
2011-09-30	1731374
2011-12-31	1658745
2012-03-31	1779299
2012-06-30	1727635
2012-09-30	1790324
2012-12-31	1776922
2013-03-31	1720674
2013-06-30	1725817
2013-09-30	1591870
2013-12-31	1524879
2014-03-31	1521630
2014-06-30	1501347
2014-09-30	1449938
2014-12-31	1328496
2015-03-31	1283096
2015-06-30	1239419
2015-09-30	1194248
2015-12-31	1134100
2016-03-31	1174383
2016-06-30	1168862
2016-09-30	1121511
2016-12-31	1032493
2017-03-31	1100319
2017-06-30	1116801
2017-09-30	1185732
2017-12-31	1268149
2018-03-31	1325772
2018-06-30	1189841
2018-09-30	1173488
2018-12-31	1159286
2019-03-31	1193061
2019-06-30	1185314
2019-09-30	1222068
2019-12-31	1224491
2020-03-31	1382093
2020-06-30	1240777
2020-09-30	1315263
2020-12-31	1436070
2021-03-31	1401238
2021-06-30	1410517
2021-09-30	1391735
2021-12-31	1439153
2022-03-31	1490116
2022-06-30	1489390
2022-09-30	1416661
2022-12-31	1418634
2023-03-31	1502817
2023-06-30	1599617
2023-09-30	1554239