Quarter	US dollars
1999-03-31	752
1999-06-30	680
1999-09-30	609
1999-12-31	572
2000-03-31	562
2000-06-30	740
2000-09-30	2458
2000-12-31	809
2001-03-31	1003
2001-06-30	838
2001-09-30	773
2001-12-31	791
2002-03-31	856
2002-06-30	604
2002-09-30	709
2002-12-31	624
2003-03-31	618
2003-06-30	590
2003-09-30	468
2003-12-31	406
2004-03-31	506
2004-06-30	513
2004-09-30	1781
2004-12-31	1657
2005-03-31	631
2005-06-30	754
2005-09-30	590
2005-12-31	589
2006-03-31	491
2006-06-30	581
2006-09-30	731
2006-12-31	845
2007-03-31	818
2007-06-30	567
2007-09-30	644
2007-12-31	566
2008-03-31	678
2008-06-30	615
2008-09-30	580
2008-12-31	773
2009-03-31	815
2009-06-30	861
2009-09-30	755
2009-12-31	639
2010-03-31	644
2010-06-30	546
2010-09-30	615
2010-12-31	837
2011-03-31	635
2011-06-30	778
2011-09-30	1312
2011-12-31	579
2012-03-31	817
2012-06-30	734
2012-09-30	818
2012-12-31	1296
2013-03-31	1251
2013-06-30	1207
2013-09-30	1544
2013-12-31	1513
2014-03-31	1396
2014-06-30	1374
2014-09-30	1421
2014-12-31	1255
2015-03-31	1154
2015-06-30	1135
2015-09-30	1170
2015-12-31	1423
2016-03-31	1782
2016-06-30	1759
2016-09-30	1883
2016-12-31	1904
2017-03-31	1787
2017-06-30	1766
2017-09-30	1788
2017-12-31	1879
2018-03-31	1990
2018-06-30	1917
2018-09-30	1232
2018-12-31	1060
2019-03-31	1025
2019-06-30	958
2019-09-30	947
2019-12-31	927
2020-03-31	1046
2020-06-30	853
2020-09-30	850
2020-12-31	880
2021-03-31	739
2021-06-30	702
2021-09-30	655
2021-12-31	692
2022-03-31	656
2022-06-30	822
2022-09-30	903
2022-12-31	941
2023-03-31	784
2023-06-30	782
2023-09-30	751