Quarter	US dollars
1999-03-31	73
1999-06-30	76
1999-09-30	75
1999-12-31	99
2000-03-31	103
2000-06-30	156
2000-09-30	196
2000-12-31	224
2001-03-31	268
2001-06-30	245
2001-09-30	239
2001-12-31	227
2002-03-31	223
2002-06-30	240
2002-09-30	234
2002-12-31	243
2003-03-31	226
2003-06-30	212
2003-09-30	217
2003-12-31	200
2004-03-31	190
2004-06-30	186
2004-09-30	167
2004-12-31	138
2005-03-31	142
2005-06-30	141
2005-09-30	147
2005-12-31	121
2006-03-31	127
2006-06-30	105
2006-09-30	109
2006-12-31	103
2007-03-31	84
2007-06-30	79
2007-09-30	80
2007-12-31	82
2008-03-31	73
2008-06-30	61
2008-09-30	38
2008-12-31	32
2009-03-31	33
2009-06-30	47
2009-09-30	101
2009-12-31	102
2010-03-31	114
2010-06-30	118
2010-09-30	103
2010-12-31	103
2011-03-31	109
2011-06-30	99
2011-09-30	117
2011-12-31	143
2012-03-31	143
2012-06-30	370
2012-09-30	361
2012-12-31	364
2013-03-31	374
2013-06-30	348
2013-09-30	450
2013-12-31	494
2014-03-31	510
2014-06-30	524
2014-09-30	489
2014-12-31	513
2015-03-31	506
2015-06-30	519
2015-09-30	546
2015-12-31	577
2016-03-31	596
2016-06-30	601
2016-09-30	630
2016-12-31	536
2017-03-31	503
2017-06-30	610
2017-09-30	606
2017-12-31	524
2018-03-31	530
2018-06-30	693
2018-09-30	693
2018-12-31	679
2019-03-31	771
2019-06-30	833
2019-09-30	864
2019-12-31	682
2020-03-31	652
2020-06-30	622
2020-09-30	863
2020-12-31	779
2021-03-31	805
2021-06-30	760
2021-09-30	744
2021-12-31	664
2022-03-31	653
2022-06-30	563
2022-09-30	561
2022-12-31	548
2023-03-31	544
2023-06-30	713
2023-09-30	729