Quarter	US dollars
1999-03-31	-1966
1999-06-30	-575
1999-09-30	2174
1999-12-31	-1828
2000-03-31	2507
2000-06-30	945
2000-09-30	309
2000-12-31	587
2001-03-31	517
2001-06-30	626
2001-09-30	2188
2001-12-31	-3141
2002-03-31	-4907
2002-06-30	-810
2002-09-30	-1038
2002-12-31	784
2003-03-31	2471
2003-06-30	495
2003-09-30	1928
2003-12-31	-230
2004-03-31	-791
2004-06-30	-358
2004-09-30	409
2004-12-31	1727
2005-03-31	3859
2005-06-30	-4003
2005-09-30	2318
2005-12-31	273
2006-03-31	1572
2006-06-30	-168
2006-09-30	5409
2006-12-31	-3370
2007-03-31	-1480
2007-06-30	5094
2007-09-30	-2751
2007-12-31	160
2008-03-31	-1341
2008-06-30	1705
2008-09-30	1874
2008-12-31	-9568
2009-03-31	-3786
2009-06-30	1272
2009-09-30	460
2009-12-31	-618
2010-03-31	957
2010-06-30	3759
2010-09-30	4487
2010-12-31	-906
2011-03-31	-1401
2011-06-30	182
2011-09-30	-2803
2011-12-31	-1919
2012-03-31	787
2012-06-30	-4549
2012-09-30	-1269
2012-12-31	1059
2013-03-31	1011
2013-06-30	4559
2013-09-30	4957
2013-12-31	-1348
2014-03-31	-1745
2014-06-30	173
2014-09-30	2696
2014-12-31	3220
2015-03-31	-747
2015-06-30	2066
2015-09-30	641
2015-12-31	5883
2016-03-31	-13000
2016-06-30	800
2016-09-30	-580
2016-12-31	1408
2017-03-31	1127
2017-06-30	-3332
2017-09-30	-1254
2017-12-31	-1811
2018-03-31	1856
2018-06-30	1088
2018-09-30	360
2018-12-31	-51
2019-03-31	-2333
2019-06-30	-525
2019-09-30	5486
2019-12-31	-3036
2020-03-31	5315
2020-06-30	-3087
2020-09-30	-1136
2020-12-31	6870
2021-03-31	-141
2021-06-30	-1143
2021-09-30	1298
2021-12-31	12076
2022-03-31	-2437
2022-06-30	-14030
2022-09-30	18825
2022-12-31	-161
2023-03-31	5094
2023-06-30	-2791
2023-09-30	-16583