Quarter	US dollars
1999-09-30	1082
1999-12-31	1049
2000-03-31	1015
2000-06-30	958
2000-09-30	937
2000-12-31	988
2001-03-31	974
2001-06-30	1014
2001-09-30	770
2001-12-31	1004
2002-03-31	1075
2002-06-30	1120
2002-09-30	1181
2002-12-31	1201
2003-03-31	1424
2003-06-30	1427
2003-09-30	1656
2003-12-31	1832
2004-03-31	1976
2004-06-30	2345
2004-09-30	2656
2004-12-31	3012
2005-03-31	3265
2005-06-30	3621
2005-09-30	3780
2005-12-31	3596
2006-03-31	3854
2006-06-30	3976
2006-09-30	4063
2006-12-31	4137
2007-03-31	4097
2007-06-30	4205
2007-09-30	4470
2007-12-31	5107
2008-03-31	5392
2008-06-30	5067
2008-09-30	5177
2008-12-31	4881
2009-03-31	5076
2009-06-30	5153
2009-09-30	5196
2009-12-31	5182
2010-03-31	5122
2010-06-30	5265
2010-09-30	5349
2010-12-31	5268
2011-03-31	5258
2011-06-30	5255
2011-09-30	4953
2011-12-31	4777
2012-03-31	4689
2012-06-30	4632
2012-09-30	4560
2012-12-31	4445
2013-03-31	4399
2013-06-30	4212
2013-09-30	4074
2013-12-31	3889
2014-03-31	4217
2014-06-30	3561
2014-09-30	3542
2014-12-31	3449
2015-03-31	3072
2015-06-30	2738
2015-09-30	2537
2015-12-31	2347
2016-03-31	2249
2016-06-30	2444
2016-09-30	2297
2016-12-31	1703
2017-03-31	1607
2017-06-30	1151
2017-09-30	997
2017-12-31	847
2018-03-31	1113
2018-06-30	1085
2018-09-30	986
2018-12-31	1037
2019-03-31	924
2019-06-30	909
2019-09-30	779
2019-12-31	758
2020-03-31	762
2020-06-30	218
2020-09-30	198
2020-12-31	253
2021-03-31	243
2021-06-30	205
2021-09-30	231
2021-12-31	199
2022-03-31	182
2022-06-30	162
2022-09-30	156
2022-12-31	156
2023-03-31	226
2023-06-30	321
2023-09-30	285