Date	Rate
2017/6/22	0.181
2017/6/21	0.183
2017/6/20	0.186
2017/6/19	0.183
2017/6/16	0.186
2017/6/15	0.183
2017/6/14	0.184
2017/6/13	0.184
2017/6/12	0.188
2017/6/9	0.180
2017/6/8	0.179
2017/6/7	0.181
2017/6/6	0.179
2017/6/5	0.177
2017/6/3	0.180
2017/6/2	0.181
2017/6/1	0.181
2017/5/31	0.179
2017/5/26	0.177
2017/5/25	0.171