日期	单位净值
2017-07-28	1.0110
2017-07-21	0.9897
2017-07-20	0.9941
2017-07-14	0.9821
2017-07-07	0.9807
2017-06-30	0.9631
2017-06-23	0.9492
2017-06-20	0.9541
2017-06-16	0.9525
2017-06-09	0.9528
2017-05-31	0.9316
2017-05-26	0.9363
2017-05-19	0.9461
2017-05-12	0.9043
2017-05-05	0.9455
2017-04-28	0.9692