Quarter	US dollars
1999-03-31	659
1999-06-30	605
1999-09-30	563
1999-12-31	599
2000-03-31	605
2000-06-30	597
2000-09-30	708
2000-12-31	631
2001-03-31	613
2001-06-30	668
2001-09-30	664
2001-12-31	740
2002-03-31	690
2002-06-30	822
2002-09-30	774
2002-12-31	855
2003-03-31	771
2003-06-30	986
2003-09-30	1022
2003-12-31	949
2004-03-31	976
2004-06-30	1102
2004-09-30	1187
2004-12-31	901
2005-03-31	1029
2005-06-30	932
2005-09-30	1096
2005-12-31	971
2006-03-31	1082
2006-06-30	1765
2006-09-30	1900
2006-12-31	1620
2007-03-31	1677
2007-06-30	1785
2007-09-30	1633
2007-12-31	2258
2008-03-31	1902
2008-06-30	2247
2008-09-30	2191
2008-12-31	1476
2009-03-31	1254
2009-06-30	1515
2009-09-30	2174
2009-12-31	1793
2010-03-31	1744
2010-06-30	1569
2010-09-30	1736
2010-12-31	1848
2011-03-31	2131
2011-06-30	2319
2011-09-30	1949
2011-12-31	2107
2012-03-31	2053
2012-06-30	1921
2012-09-30	2043
2012-12-31	2600
2013-03-31	2487
2013-06-30	2427
2013-09-30	2408
2013-12-31	2563
2014-03-31	2674
2014-06-30	2675
2014-09-30	2476
2014-12-31	2111
2015-03-31	2158
2015-06-30	2304
2015-09-30	17
2015-12-31	24
2016-03-31	38
2016-06-30	28
2016-09-30	30
2016-12-31	22
2017-03-31	28
2017-06-30	26
2017-09-30	32
2017-12-31	36
2018-03-31	24
2018-06-30	39
2018-09-30	58
2018-12-31	60
2019-03-31	25
2019-06-30	26
2019-09-30	28
2019-12-31	39
2020-03-31	43
2020-06-30	32
2020-09-30	44
2020-12-31	80
2021-03-31	63
2021-06-30	49
2021-09-30	56
2021-12-31	45
2022-03-31	61
2022-06-30	73
2022-09-30	58
2022-12-31	65
2023-03-31	25
2023-06-30	27
2023-09-30	22