Quarter	US dollars
1997-09-30	0
1997-12-31	0
1998-03-31	0
1998-06-30	0
1998-09-30	116
1998-12-31	0
1999-03-31	0
1999-06-30	0
1999-09-30	30
1999-12-31	34
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	90
2001-03-31	435
2001-06-30	785
2001-09-30	859
2001-12-31	1379
2002-03-31	1612
2002-06-30	1703
2002-09-30	1656
2002-12-31	1709
2003-03-31	2046
2003-06-30	2015
2003-09-30	2145
2003-12-31	2242
2004-03-31	2298
2004-06-30	2190
2004-09-30	2156
2004-12-31	2220
2005-03-31	2498
2005-06-30	2405
2005-09-30	2346
2005-12-31	1329
2006-03-31	1494
2006-06-30	1106
2006-09-30	1059
2006-12-31	1048
2007-03-31	1059
2007-06-30	1012
2007-09-30	1189
2007-12-31	2390
2008-03-31	2951
2008-06-30	1144
2008-09-30	793
2008-12-31	288
2009-03-31	264
2009-06-30	926
2009-09-30	2000
2009-12-31	1826
2010-03-31	1121
2010-06-30	1258
2010-09-30	1752
2010-12-31	3545
2011-03-31	3518
2011-06-30	3768
2011-09-30	5090
2011-12-31	3813
2012-03-31	2944
2012-06-30	1343
2012-09-30	1251
2012-12-31	1020
2013-03-31	1356
2013-06-30	1045
2013-09-30	1055
2013-12-31	1474
2014-03-31	1190
2014-06-30	1416
2014-09-30	1384
2014-12-31	1212
2015-03-31	1101
2015-06-30	998
2015-09-30	1019
2015-12-31	1182
2016-03-31	1265
2016-06-30	1849
2016-09-30	1640
2016-12-31	1391
2017-03-31	1507
2017-06-30	1439
2017-09-30	1287
2017-12-31	1284
2018-03-31	1561
2018-06-30	1500
2018-09-30	2175
2018-12-31	2425
2019-03-31	2761
2019-06-30	2693
2019-09-30	3139
2019-12-31	4086