yyyy/mm/dd,201202,201204
2012/01/04,39000,35050
2012/01/05,39900,35050
2012/01/06,39900,33000
2012/01/10,39900,33000
2012/01/11,39800,33000
2012/01/12,39800,33000
2012/01/13,39800,33000
2012/01/16,39500,33000
2012/01/17,39500,33000
2012/01/18,39500,33000
2012/01/19,37500,33000
2012/01/20,37500,33100
2012/01/23,37500,34000
2012/01/24,37500,34000
2012/01/25,37500,34000
2012/01/26,37500,34000
2012/01/27,37000,34000
2012/01/30,36800,34000
2012/01/31,36300,34000
yyyy/mm/dd,201202,201204
2012/02/01,36200,34000
2012/02/02,36200,34000
2012/02/03,36600,36000
2012/02/06,36600,36000
2012/02/07,38000,36000
2012/02/08,38000,36000
2012/02/09,38000,36000
2012/02/10,38000,37550
2012/02/13,38000,37550
2012/02/14,38000,37550
2012/02/15,38000,37550
2012/02/16,44000,37550
2012/02/17,49000,37550
2012/02/20,49000,37550
2012/02/21,49000,41000
2012/02/22,49000,40500
2012/02/23,49000,40450
2012/02/24,49000,40450
2012/02/27,,40450
2012/02/28,,40450
2012/02/29,,40450
yyyy/mm/dd,201204
2012/03/01,40450
2012/03/02,40450
2012/03/05,40450
2012/03/06,40450
2012/03/07,40450
2012/03/08,40450
2012/03/09,40450
2012/03/12,37800
2012/03/13,37800
2012/03/14,43800
2012/03/15,45000
2012/03/16,47000
2012/03/19,47000
2012/03/21,47000
2012/03/22,47000
2012/03/23,47000
2012/03/26,47000
2012/03/27,47000
2012/03/28,47000
2012/03/29,47000
2012/03/30,45000
yyyy/mm/dd,201204
2012/04/02,45000
2012/04/03,45050
2012/04/04,46000
2012/04/05,46000
2012/04/06,47050
2012/04/09,47050
2012/04/10,47600
2012/04/11,50100
2012/04/12,50100
2012/04/13,50100
2012/04/16,50100
2012/04/17,50100
2012/04/18,50100
2012/04/19,50100
2012/04/20,50100
2012/04/23,50100
2012/04/24,50100