Quarter	US dollars
1999-03-31	687799
1999-06-30	648958
1999-09-30	689266
1999-12-31	669335
2000-03-31	739005
2000-06-30	740768
2000-09-30	702305
2000-12-31	795710
2001-03-31	863465
2001-06-30	786111
2001-09-30	836929
2001-12-31	801425
2002-03-31	773924
2002-06-30	797552
2002-09-30	832860
2002-12-31	924083
2003-03-31	962178
2003-06-30	1047044
2003-09-30	1032872
2003-12-31	1200438
2004-03-31	1331505
2004-06-30	1330657
2004-09-30	1314271
2004-12-31	1379570
2005-03-31	1521520
2005-06-30	1487126
2005-09-30	1498626
2005-12-31	1487932
2006-03-31	1629707
2006-06-30	1759661
2006-09-30	1767658
2006-12-31	1796875
2007-03-31	2093084
2007-06-30	2166877
2007-09-30	2295723
2007-12-31	2480741
2008-03-31	2758367
2008-06-30	2557178
2008-09-30	2368347
2008-12-31	2067865
2009-03-31	1932616
2009-06-30	2084505
2009-09-30	1964541
2009-12-31	1926654
2010-03-31	1922324
2010-06-30	1866408
2010-09-30	1994600
2010-12-31	1750655
2011-03-31	1745071
2011-06-30	1724867
2011-09-30	1789747
2011-12-31	1682309
2012-03-31	1832753
2012-06-30	1748471
2012-09-30	1721163
2012-12-31	1626018
2013-03-31	1510383
2013-06-30	1442192
2013-09-30	1357083
2013-12-31	1302953
2014-03-31	1341421
2014-06-30	1273041
2014-09-30	1196398
2014-12-31	1134756
2015-03-31	1129769
2015-06-30	1155536
2015-09-30	1146100
2015-12-31	1092137
2016-03-31	1085969
2016-06-30	1183058
2016-09-30	1219567
2016-12-31	1182813
2017-03-31	1208580
2017-06-30	1274519
2017-09-30	1323931
2017-12-31	1402515
2018-03-31	1403658
2018-06-30	1420260
2018-09-30	1386673
2018-12-31	1329163
2019-03-31	1312151
2019-06-30	1306506
2019-09-30	1288999
2019-12-31	1193798
2020-03-31	1242616
2020-06-30	1231071
2020-09-30	1332042
2020-12-31	1406176
2021-03-31	1467690
2021-06-30	1477881
2021-09-30	1381606
2021-12-31	1387567
2022-03-31	1458789
2022-06-30	1419855
2022-09-30	1356015
2022-12-31	1379584
2023-03-31	1396876
2023-06-30	1373821
2023-09-30	1306793