Quarter	US dollars
1999-03-31	220
1999-06-30	162
1999-09-30	215
1999-12-31	242
2000-03-31	291
2000-06-30	309
2000-09-30	222
2000-12-31	218
2001-03-31	181
2001-06-30	236
2001-09-30	213
2001-12-31	227
2002-03-31	214
2002-06-30	223
2002-09-30	342
2002-12-31	283
2003-03-31	348
2003-06-30	331
2003-09-30	344
2003-12-31	338
2004-03-31	257
2004-06-30	248
2004-09-30	223
2004-12-31	290
2005-03-31	211
2005-06-30	187
2005-09-30	247
2005-12-31	324
2006-03-31	292
2006-06-30	183
2006-09-30	363
2006-12-31	288
2007-03-31	290
2007-06-30	279
2007-09-30	744
2007-12-31	828
2008-03-31	281
2008-06-30	429
2008-09-30	334
2008-12-31	596
2009-03-31	313
2009-06-30	301
2009-09-30	238
2009-12-31	462
2010-03-31	298
2010-06-30	361
2010-09-30	568
2010-12-31	511
2011-03-31	786
2011-06-30	426
2011-09-30	514
2011-12-31	154
2012-03-31	421
2012-06-30	233
2012-09-30	185
2012-12-31	178
2013-03-31	255
2013-06-30	165
2013-09-30	179
2013-12-31	169
2014-03-31	159
2014-06-30	128
2014-09-30	249
2014-12-31	204
2015-03-31	220
2015-06-30	264
2015-09-30	124
2015-12-31	129
2016-03-31	123
2016-06-30	121
2016-09-30	110
2016-12-31	146
2017-03-31	96
2017-06-30	93
2017-09-30	83
2017-12-31	84
2018-03-31	82
2018-06-30	113
2018-09-30	232
2018-12-31	110
2019-03-31	105
2019-06-30	74
2019-09-30	368
2019-12-31	359
2020-03-31	56
2020-06-30	64
2020-09-30	71
2020-12-31	59
2021-03-31	61
2021-06-30	54
2021-09-30	36
2021-12-31	49
2022-03-31	34
2022-06-30	49
2022-09-30	63
2022-12-31	36
2023-03-31	51
2023-06-30	41
2023-09-30	36