Quarter	US dollars
1999-03-31	133324
1999-06-30	105639
1999-09-30	123533
1999-12-31	125637
2000-03-31	112520
2000-06-30	122583
2000-09-30	122628
2000-12-31	137389
2001-03-31	127407
2001-06-30	122747
2001-09-30	119330
2001-12-31	122224
2002-03-31	110149
2002-06-30	121487
2002-09-30	124603
2002-12-31	166371
2003-03-31	149589
2003-06-30	168612
2003-09-30	131675
2003-12-31	141378
2004-03-31	139743
2004-06-30	161230
2004-09-30	154970
2004-12-31	175692
2005-03-31	128573
2005-06-30	126283
2005-09-30	122679
2005-12-31	123106
2006-03-31	100443
2006-06-30	109750
2006-09-30	108443
2006-12-31	88651
2007-03-31	96709
2007-06-30	86922
2007-09-30	94588
2007-12-31	112416
2008-03-31	128755
2008-06-30	110732
2008-09-30	104986
2008-12-31	113648
2009-03-31	105060
2009-06-30	138121
2009-09-30	145293
2009-12-31	132675
2010-03-31	147207
2010-06-30	141324
2010-09-30	178210
2010-12-31	176482
2011-03-31	178177
2011-06-30	176332
2011-09-30	187328
2011-12-31	178336
2012-03-31	211007
2012-06-30	215437
2012-09-30	217755
2012-12-31	236949
2013-03-31	242386
2013-06-30	212169
2013-09-30	231910
2013-12-31	204598
2014-03-31	197183
2014-06-30	197899
2014-09-30	189180
2014-12-31	185456
2015-03-31	166664
2015-06-30	165664
2015-09-30	162625
2015-12-31	176380
2016-03-31	187012
2016-06-30	202206
2016-09-30	195243
2016-12-31	198464
2017-03-31	201496
2017-06-30	194298
2017-09-30	230718
2017-12-31	213934
2018-03-31	245595
2018-06-30	231083
2018-09-30	245765
2018-12-31	229219
2019-03-31	244969
2019-06-30	273783
2019-09-30	257551
2019-12-31	242552
2020-03-31	276620
2020-06-30	270915
2020-09-30	258138
2020-12-31	236326
2021-03-31	243437
2021-06-30	243450
2021-09-30	232763
2021-12-31	213872
2022-03-31	225018
2022-06-30	231303
2022-09-30	217056
2022-12-31	218312
2023-03-31	215950
2023-06-30	213396
2023-09-30	233542