Quarter	US dollars
1999-03-31	1278
1999-06-30	1179
1999-09-30	1130
1999-12-31	1122
2000-03-31	1030
2000-06-30	1120
2000-09-30	793
2000-12-31	669
2001-03-31	569
2001-06-30	539
2001-09-30	462
2001-12-31	357
2002-03-31	607
2002-06-30	1835
2002-09-30	631
2002-12-31	876
2003-03-31	753
2003-06-30	924
2003-09-30	544
2003-12-31	1220
2004-03-31	672
2004-06-30	595
2004-09-30	742
2004-12-31	609
2005-03-31	307
2005-06-30	373
2005-09-30	722
2005-12-31	346
2006-03-31	321
2006-06-30	409
2006-09-30	411
2006-12-31	631
2007-03-31	714
2007-06-30	330
2007-09-30	330
2007-12-31	301
2008-03-31	783
2008-06-30	298
2008-09-30	338
2008-12-31	296
2009-03-31	295
2009-06-30	367
2009-09-30	510
2009-12-31	504
2010-03-31	756
2010-06-30	1599
2010-09-30	1812
2010-12-31	2569
2011-03-31	2607
2011-06-30	1048
2011-09-30	1468
2011-12-31	1447
2012-03-31	1828
2012-06-30	1608
2012-09-30	1392
2012-12-31	1332
2013-03-31	1991
2013-06-30	2249
2013-09-30	954
2013-12-31	873
2014-03-31	1428
2014-06-30	1321
2014-09-30	874
2014-12-31	936
2015-03-31	787
2015-06-30	1234
2015-09-30	1520
2015-12-31	1410
2016-03-31	1098
2016-06-30	1665
2016-09-30	1255
2016-12-31	1155
2017-03-31	1030
2017-06-30	1624
2017-09-30	2060
2017-12-31	2104
2018-03-31	1189
2018-06-30	1053
2018-09-30	959
2018-12-31	690
2019-03-31	708
2019-06-30	861
2019-09-30	584
2019-12-31	608
2020-03-31	703
2020-06-30	925
2020-09-30	849
2020-12-31	1669
2021-03-31	785
2021-06-30	683
2021-09-30	923
2021-12-31	918
2022-03-31	939
2022-06-30	970
2022-09-30	1187
2022-12-31	845
2023-03-31	1090
2023-06-30	1636
2023-09-30	1788