Quarter	US dollars
1999-03-31	2077
1999-06-30	1946
1999-09-30	1905
1999-12-31	1584
2000-03-31	1536
2000-06-30	1507
2000-09-30	1539
2000-12-31	1978
2001-03-31	1684
2001-06-30	1350
2001-09-30	1497
2001-12-31	1178
2002-03-31	1140
2002-06-30	1202
2002-09-30	1274
2002-12-31	1365
2003-03-31	1413
2003-06-30	960
2003-09-30	1223
2003-12-31	963
2004-03-31	760
2004-06-30	1137
2004-09-30	766
2004-12-31	1006
2005-03-31	712
2005-06-30	674
2005-09-30	513
2005-12-31	263
2006-03-31	705
2006-06-30	614
2006-09-30	558
2006-12-31	931
2007-03-31	878
2007-06-30	719
2007-09-30	974
2007-12-31	1327
2008-03-31	1744
2008-06-30	1899
2008-09-30	1572
2008-12-31	1502
2009-03-31	1397
2009-06-30	934
2009-09-30	695
2009-12-31	329
2010-03-31	227
2010-06-30	215
2010-09-30	205
2010-12-31	107
2011-03-31	128
2011-06-30	234
2011-09-30	186
2011-12-31	142
2012-03-31	140
2012-06-30	231
2012-09-30	271
2012-12-31	235
2013-03-31	189
2013-06-30	206
2013-09-30	363
2013-12-31	164
2014-03-31	212
2014-06-30	205
2014-09-30	276
2014-12-31	226
2015-03-31	268
2015-06-30	183
2015-09-30	144
2015-12-31	76
2016-03-31	135
2016-06-30	92
2016-09-30	194
2016-12-31	104
2017-03-31	125
2017-06-30	73
2017-09-30	132
2017-12-31	187
2018-03-31	124
2018-06-30	109
2018-09-30	108
2018-12-31	43
2019-03-31	160
2019-06-30	188
2019-09-30	46
2019-12-31	29
2020-03-31	102
2020-06-30	62
2020-09-30	130
2020-12-31	20
2021-03-31	62
2021-06-30	57
2021-09-30	16
2021-12-31	10
2022-03-31	49
2022-06-30	95
2022-09-30	36
2022-12-31	31
2023-03-31	46
2023-06-30	12
2023-09-30	15