Quarter	US dollars
1999-03-31	911
1999-06-30	914
1999-09-30	1032
1999-12-31	715
2000-03-31	649
2000-06-30	655
2000-09-30	681
2000-12-31	841
2001-03-31	1068
2001-06-30	817
2001-09-30	855
2001-12-31	928
2002-03-31	983
2002-06-30	952
2002-09-30	725
2002-12-31	875
2003-03-31	850
2003-06-30	993
2003-09-30	890
2003-12-31	1087
2004-03-31	1184
2004-06-30	590
2004-09-30	1380
2004-12-31	1233
2005-03-31	1351
2005-06-30	1001
2005-09-30	1715
2005-12-31	2006
2006-03-31	2617
2006-06-30	3029
2006-09-30	4619
2006-12-31	3415
2007-03-31	3263
2007-06-30	2314
2007-09-30	1745
2007-12-31	2563
2008-03-31	2723
2008-06-30	2107
2008-09-30	2112
2008-12-31	1232
2009-03-31	701
2009-06-30	692
2009-09-30	1237
2009-12-31	1620
2010-03-31	1236
2010-06-30	375
2010-09-30	863
2010-12-31	593
2011-03-31	370
2011-06-30	737
2011-09-30	825
2011-12-31	422
2012-03-31	263
2012-06-30	47
2012-09-30	48
2012-12-31	56
2013-03-31	232
2013-06-30	195
2013-09-30	243
2013-12-31	551
2014-03-31	740
2014-06-30	723
2014-09-30	508
2014-12-31	686
2015-03-31	428
2015-06-30	717
2015-09-30	468
2015-12-31	675
2016-03-31	544
2016-06-30	448
2016-09-30	375
2016-12-31	234
2017-03-31	915
2017-06-30	933
2017-09-30	564
2017-12-31	868
2018-03-31	1856
2018-06-30	1263
2018-09-30	1013
2018-12-31	494
2019-03-31	1224
2019-06-30	922
2019-09-30	712
2019-12-31	703
2020-03-31	1211
2020-06-30	707
2020-09-30	726
2020-12-31	946
2021-03-31	612
2021-06-30	581
2021-09-30	654
2021-12-31	586
2022-03-31	1188
2022-06-30	981
2022-09-30	948
2022-12-31	1669
2023-03-31	812
2023-06-30	660
2023-09-30	781