yyyy/mm/dd,201301,201303
2013/01/04,16000,19500
2013/01/07,16000,18600
2013/01/08,16000,18650
2013/01/09,16000,18500
2013/01/10,16000,17370
2013/01/11,16000,17190
2013/01/15,16000,17320
2013/01/16,16000,18320
2013/01/17,16000,18840
2013/01/18,,19370
2013/01/21,,19190
2013/01/22,,18500
2013/01/23,,18960
2013/01/24,,18590
2013/01/25,,18650
2013/01/28,,18050
2013/01/29,,18330
2013/01/30,,17000
2013/01/31,,17000
yyyy/mm/dd,201303
2013/02/01,17170
2013/02/04,17000
2013/02/05,17000
2013/02/06,17000
2013/02/07,17000
2013/02/08,17000