Quarter	US dollars
1999-03-31	144
1999-06-30	115
1999-09-30	109
1999-12-31	99
2000-03-31	100
2000-06-30	113
2000-09-30	93
2000-12-31	81
2001-03-31	90
2001-06-30	100
2001-09-30	125
2001-12-31	121
2002-03-31	115
2002-06-30	126
2002-09-30	123
2002-12-31	103
2003-03-31	144
2003-06-30	138
2003-09-30	97
2003-12-31	119
2004-03-31	119
2004-06-30	124
2004-09-30	123
2004-12-31	202
2005-03-31	172
2005-06-30	205
2005-09-30	184
2005-12-31	166
2006-03-31	183
2006-06-30	202
2006-09-30	207
2006-12-31	225
2007-03-31	170
2007-06-30	182
2007-09-30	199
2007-12-31	163
2008-03-31	242
2008-06-30	227
2008-09-30	220
2008-12-31	215
2009-03-31	198
2009-06-30	155
2009-09-30	119
2009-12-31	129
2010-03-31	129
2010-06-30	126
2010-09-30	117
2010-12-31	245
2011-03-31	213
2011-06-30	218
2011-09-30	226
2011-12-31	163
2012-03-31	156
2012-06-30	204
2012-09-30	242
2012-12-31	200
2013-03-31	153
2013-06-30	284
2013-09-30	320
2013-12-31	326
2014-03-31	254
2014-06-30	269
2014-09-30	276
2014-12-31	300
2015-03-31	366
2015-06-30	279