日期	单位净值
2017-05-12	2.1163
2017-05-05	2.1071
2017-04-28	2.1325
2017-04-21	2.1179
2017-04-20	2.1552
2017-04-14	2.0401
2017-04-07	2.0668
2017-03-31	2.0574
2017-03-24	2.0471
2017-03-20	1.9741
2017-03-17	1.9790
2017-03-10	1.9269
2017-03-03	1.8614
2017-02-24	1.8787
2017-02-20	1.8673
2017-02-17	1.8301