Quarter	US dollars
1999-03-31	160
1999-06-30	154
1999-09-30	173
1999-12-31	172
2000-03-31	133
2000-06-30	128
2000-09-30	138
2000-12-31	130
2001-03-31	125
2001-06-30	126
2001-09-30	114
2001-12-31	126
2002-03-31	103
2002-06-30	106
2002-09-30	112
2002-12-31	114
2003-03-31	111
2003-06-30	123
2003-09-30	112
2003-12-31	142
2004-03-31	112
2004-06-30	104
2004-09-30	112
2004-12-31	183
2005-03-31	184
2005-06-30	189
2005-09-30	202
2005-12-31	212
2006-03-31	198
2006-06-30	401
2006-09-30	468
2006-12-31	498
2007-03-31	421
2007-06-30	429
2007-09-30	424
2007-12-31	486
2008-03-31	468
2008-06-30	496
2008-09-30	284
2008-12-31	252
2009-03-31	182
2009-06-30	209
2009-09-30	227
2009-12-31	233
2010-03-31	384
2010-06-30	137
2010-09-30	149
2010-12-31	146
2011-03-31	213
2011-06-30	214
2011-09-30	341
2011-12-31	236
2012-03-31	323
2012-06-30	312
2012-09-30	294
2012-12-31	204
2013-03-31	202
2013-06-30	189
2013-09-30	201
2013-12-31	179
2014-03-31	191
2014-06-30	161
2014-09-30	136
2014-12-31	129
2015-03-31	144
2015-06-30	142