Quarter	US dollars
1999-03-31	23
1999-06-30	46
1999-09-30	24
1999-12-31	24
2000-03-31	25
2000-06-30	25
2000-09-30	29
2000-12-31	30
2001-03-31	26
2001-06-30	26
2001-09-30	26
2001-12-31	18
2002-03-31	19
2002-06-30	30
2002-09-30	29
2002-12-31	30
2003-03-31	33
2003-06-30	29
2003-09-30	29
2003-12-31	30
2004-03-31	31
2004-06-30	33
2004-09-30	35
2004-12-31	35
2005-03-31	34
2005-06-30	35
2005-09-30	31
2005-12-31	32
2006-03-31	38
2006-06-30	33
2006-09-30	36
2006-12-31	34
2007-03-31	43
2007-06-30	50
2007-09-30	41
2007-12-31	45
2008-03-31	89
2008-06-30	30
2008-09-30	31
2008-12-31	24
2009-03-31	23
2009-06-30	19
2009-09-30	19
2009-12-31	22
2010-03-31	21
2010-06-30	24
2010-09-30	33
2010-12-31	25
2011-03-31	26
2011-06-30	58
2011-09-30	46
2011-12-31	39
2012-03-31	29
2012-06-30	28
2012-09-30	33
2012-12-31	30
2013-03-31	38
2013-06-30	33
2013-09-30	33
2013-12-31	35
2014-03-31	21
2014-06-30	38
2014-09-30	38
2014-12-31	38
2015-03-31	38
2015-06-30	43
2015-09-30	39
2015-12-31	39
2016-03-31	39
2016-06-30	47
2016-09-30	34
2016-12-31	26
2017-03-31	30
2017-06-30	28
2017-09-30	41
2017-12-31	41
2018-03-31	39
2018-06-30	33
2018-09-30	36
2018-12-31	31
2019-03-31	83
2019-06-30	79
2019-09-30	47
2019-12-31	47
2020-03-31	44
2020-06-30	37
2020-09-30	35
2020-12-31	38
2021-03-31	41
2021-06-30	40
2021-09-30	32
2021-12-31	36
2022-03-31	36
2022-06-30	68
2022-09-30	65
2022-12-31	69
2023-03-31	70
2023-06-30	65
2023-09-30	61