Quarter	US dollars
1999-03-31	238
1999-06-30	212
1999-09-30	199
1999-12-31	223
2000-03-31	206
2000-06-30	217
2000-09-30	333
2000-12-31	285
2001-03-31	275
2001-06-30	305
2001-09-30	311
2001-12-31	404
2002-03-31	365
2002-06-30	417
2002-09-30	417
2002-12-31	525
2003-03-31	463
2003-06-30	526
2003-09-30	608
2003-12-31	515
2004-03-31	541
2004-06-30	600
2004-09-30	532
2004-12-31	414
2005-03-31	469
2005-06-30	445
2005-09-30	508
2005-12-31	363
2006-03-31	422
2006-06-30	913
2006-09-30	1124
2006-12-31	1019
2007-03-31	1036
2007-06-30	1030
2007-09-30	1054
2007-12-31	1241
2008-03-31	945
2008-06-30	1075
2008-09-30	1198
2008-12-31	781
2009-03-31	652
2009-06-30	790
2009-09-30	834
2009-12-31	810
2010-03-31	887
2010-06-30	827
2010-09-30	920
2010-12-31	966
2011-03-31	1140
2011-06-30	1135
2011-09-30	898
2011-12-31	965
2012-03-31	988
2012-06-30	764
2012-09-30	793
2012-12-31	1030
2013-03-31	968
2013-06-30	913
2013-09-30	898
2013-12-31	884
2014-03-31	1213
2014-06-30	1099
2014-09-30	988
2014-12-31	810
2015-03-31	843
2015-06-30	853