日期	单位净值
2017-04-28	1.0035
2017-04-21	0.9915
2017-04-14	0.9915
2017-04-07	0.9915
2017-03-31	0.9915
2017-03-24	0.9918
2017-03-17	0.9918
2017-03-10	0.9918
2017-03-03	0.9859
2017-02-28	0.9859
2017-02-24	0.9885
2017-02-17	0.9885
2017-02-10	0.9885
2017-02-03	0.9885
2017-01-31	0.9885
2017-01-26	0.9905