Quarter	US dollars
1999-03-31	103
1999-06-30	196
1999-09-30	155
1999-12-31	147
2000-03-31	244
2000-06-30	302
2000-09-30	240
2000-12-31	176
2001-03-31	281
2001-06-30	272
2001-09-30	204
2001-12-31	243
2002-03-31	283
2002-06-30	298
2002-09-30	341
2002-12-31	392
2003-03-31	546
2003-06-30	518
2003-09-30	557
2003-12-31	368
2004-03-31	450
2004-06-30	296
2004-09-30	496
2004-12-31	472
2005-03-31	558
2005-06-30	399
2005-09-30	668
2005-12-31	637
2006-03-31	1076
2006-06-30	1110
2006-09-30	1463
2006-12-31	1544
2007-03-31	1213
2007-06-30	938
2007-09-30	1632
2007-12-31	1154
2008-03-31	800
2008-06-30	470
2008-09-30	1133
2008-12-31	875
2009-03-31	822
2009-06-30	1200
2009-09-30	914
2009-12-31	684
2010-03-31	1471
2010-06-30	709
2010-09-30	1337
2010-12-31	1729
2011-03-31	1178
2011-06-30	1157
2011-09-30	1108
2011-12-31	2426
2012-03-31	1485
2012-06-30	1011
2012-09-30	1043
2012-12-31	549
2013-03-31	497
2013-06-30	410
2013-09-30	374
2013-12-31	281
2014-03-31	352
2014-06-30	578
2014-09-30	1100
2014-12-31	1046
2015-03-31	1316
2015-06-30	1399
2015-09-30	1957
2015-12-31	2124
2016-03-31	2749
2016-06-30	3002
2016-09-30	2074
2016-12-31	2535
2017-03-31	2368
2017-06-30	1427
2017-09-30	482
2017-12-31	1857
2018-03-31	247
2018-06-30	658
2018-09-30	807
2018-12-31	1108
2019-03-31	564
2019-06-30	1099
2019-09-30	544
2019-12-31	993
2020-03-31	1500
2020-06-30	471
2020-09-30	330
2020-12-31	593
2021-03-31	654
2021-06-30	645
2021-09-30	322
2021-12-31	498
2022-03-31	262
2022-06-30	765
2022-09-30	982
2022-12-31	1071
2023-03-31	833
2023-06-30	641
2023-09-30	1366