Quarter	US dollars
1999-03-31	743
1999-06-30	737
1999-09-30	706
1999-12-31	757
2000-03-31	710
2000-06-30	725
2000-09-30	791
2000-12-31	799
2001-03-31	648
2001-06-30	708
2001-09-30	708
2001-12-31	738
2002-03-31	735
2002-06-30	686
2002-09-30	758
2002-12-31	863
2003-03-31	802
2003-06-30	821
2003-09-30	884
2003-12-31	823
2004-03-31	798
2004-06-30	618
2004-09-30	529
2004-12-31	560
2005-03-31	511
2005-06-30	646
2005-09-30	687
2005-12-31	592
2006-03-31	592
2006-06-30	554
2006-09-30	818
2006-12-31	744
2007-03-31	741
2007-06-30	785
2007-09-30	847
2007-12-31	910
2008-03-31	1850
2008-06-30	1506
2008-09-30	1718
2008-12-31	1133
2009-03-31	1023
2009-06-30	1607
2009-09-30	1706
2009-12-31	1745
2010-03-31	2091
2010-06-30	2148
2010-09-30	2272
2010-12-31	2432
2011-03-31	2304
2011-06-30	749
2011-09-30	316
2011-12-31	174
2012-03-31	167
2012-06-30	125
2012-09-30	185
2012-12-31	179
2013-03-31	158
2013-06-30	199
2013-09-30	192
2013-12-31	191
2014-03-31	183
2014-06-30	181
2014-09-30	168
2014-12-31	159
2015-03-31	149
2015-06-30	154
2015-09-30	103
2015-12-31	147
2016-03-31	145
2016-06-30	140
2016-09-30	138
2016-12-31	133
2017-03-31	136
2017-06-30	139
2017-09-30	143
2017-12-31	145
2018-03-31	147
2018-06-30	142
2018-09-30	140
2018-12-31	139
2019-03-31	140
2019-06-30	179
2019-09-30	174
2019-12-31	180
2020-03-31	174
2020-06-30	179
2020-09-30	185
2020-12-31	194
2021-03-31	192
2021-06-30	194
2021-09-30	193
2021-12-31	193
2022-03-31	191
2022-06-30	180
2022-09-30	159
2022-12-31	171
2023-03-31	174
2023-06-30	175
2023-09-30	171