Quarter	US dollars
1999-03-31	297
1999-06-30	332
1999-09-30	293
1999-12-31	360
2000-03-31	377
2000-06-30	372
2000-09-30	363
2000-12-31	418
2001-03-31	386
2001-06-30	357
2001-09-30	313
2001-12-31	628
2002-03-31	652
2002-06-30	731
2002-09-30	762
2002-12-31	780
2003-03-31	575
2003-06-30	569
2003-09-30	575
2003-12-31	707
2004-03-31	786
2004-06-30	804
2004-09-30	865
2004-12-31	948
2005-03-31	949
2005-06-30	1052
2005-09-30	1231
2005-12-31	1324
2006-03-31	1398
2006-06-30	1517
2006-09-30	1432
2006-12-31	1530
2007-03-31	1559
2007-06-30	1541
2007-09-30	1895
2007-12-31	1598
2008-03-31	1515
2008-06-30	1139
2008-09-30	713
2008-12-31	149
2009-03-31	108
2009-06-30	126
2009-09-30	127
2009-12-31	78
2010-03-31	115
2010-06-30	130
2010-09-30	92
2010-12-31	127
2011-03-31	190
2011-06-30	65
2011-09-30	122
2011-12-31	237
2012-03-31	7
2012-06-30	158
2012-09-30	6
2012-12-31	3
2013-03-31	7
2013-06-30	8
2013-09-30	6
2013-12-31	9
2014-03-31	6
2014-06-30	7
2014-09-30	621
2014-12-31	380
2015-03-31	7
2015-06-30	8
2015-09-30	14
2015-12-31	14
2016-03-31	10
2016-06-30	22
2016-09-30	24
2016-12-31	22
2017-03-31	24
2017-06-30	27
2017-09-30	97
2017-12-31	87
2018-03-31	148
2018-06-30	103
2018-09-30	142
2018-12-31	275
2019-03-31	173
2019-06-30	211
2019-09-30	284
2019-12-31	293
2020-03-31	220
2020-06-30	293
2020-09-30	306
2020-12-31	323
2021-03-31	329
2021-06-30	348
2021-09-30	303
2021-12-31	376
2022-03-31	495
2022-06-30	428
2022-09-30	728
2022-12-31	665
2023-03-31	327
2023-06-30	504
2023-09-30	498