日期	单位净值
2017-05-31	0.9881
2017-05-26	0.9887
2017-05-19	0.9885
2017-05-12	0.9893
2017-05-05	0.9891
2017-04-28	0.9899
2017-04-21	0.9897
2017-04-14	0.9905
2017-04-07	0.9902
2017-03-31	0.9910
2017-03-24	0.9908
2017-03-17	0.9916
2017-03-10	0.9914
2017-03-03	0.9922
2017-02-28	0.9916
2017-02-24	0.9920