Quarter	US dollars
1999-03-31	238
1999-06-30	271
1999-09-30	263
1999-12-31	207
2000-03-31	208
2000-06-30	228
2000-09-30	204
2000-12-31	150
2001-03-31	200
2001-06-30	203
2001-09-30	210
2001-12-31	156
2002-03-31	141
2002-06-30	150
2002-09-30	175
2002-12-31	190
2003-03-31	190
2003-06-30	202
2003-09-30	207
2003-12-31	197
2004-03-31	186
2004-06-30	397
2004-09-30	398
2004-12-31	240
2005-03-31	280
2005-06-30	250
2005-09-30	271
2005-12-31	250
2006-03-31	249
2006-06-30	359
2006-09-30	238
2006-12-31	404
2007-03-31	406
2007-06-30	504
2007-09-30	662
2007-12-31	584
2008-03-31	524
2008-06-30	464
2008-09-30	420
2008-12-31	433
2009-03-31	483
2009-06-30	1872
2009-09-30	557
2009-12-31	600
2010-03-31	471
2010-06-30	474
2010-09-30	635
2010-12-31	743
2011-03-31	846
2011-06-30	608
2011-09-30	781
2011-12-31	699
2012-03-31	721
2012-06-30	674
2012-09-30	825
2012-12-31	780
2013-03-31	915
2013-06-30	949
2013-09-30	1137
2013-12-31	1046
2014-03-31	844
2014-06-30	751
2014-09-30	900
2014-12-31	659
2015-03-31	549
2015-06-30	681