Quarter	US dollars
1999-03-31	177
1999-06-30	166
1999-09-30	145
1999-12-31	140
2000-03-31	143
2000-06-30	222
2000-09-30	150
2000-12-31	54
2001-03-31	62
2001-06-30	132
2001-09-30	135
2001-12-31	105
2002-03-31	87
2002-06-30	81
2002-09-30	140
2002-12-31	160
2003-03-31	194
2003-06-30	281
2003-09-30	291
2003-12-31	280
2004-03-31	387
2004-06-30	434
2004-09-30	274
2004-12-31	514
2005-03-31	449
2005-06-30	464
2005-09-30	516
2005-12-31	805
2006-03-31	696
2006-06-30	741
2006-09-30	724
2006-12-31	910
2007-03-31	959
2007-06-30	1338
2007-09-30	1048
2007-12-31	1623
2008-03-31	1583
2008-06-30	1791
2008-09-30	1365
2008-12-31	1173
2009-03-31	789
2009-06-30	629
2009-09-30	430
2009-12-31	601
2010-03-31	734
2010-06-30	730
2010-09-30	683
2010-12-31	208
2011-03-31	246
2011-06-30	238
2011-09-30	381
2011-12-31	831
2012-03-31	720
2012-06-30	693
2012-09-30	707
2012-12-31	833
2013-03-31	544
2013-06-30	611
2013-09-30	673
2013-12-31	611
2014-03-31	467
2014-06-30	762
2014-09-30	694
2014-12-31	588
2015-03-31	549
2015-06-30	526