Date	Rate
2018/6/27	0.192
2018/6/26	0.192
2018/6/25	0.190
2018/6/22	0.191
2018/6/21	0.188
2018/6/20	0.189
2018/6/19	0.192
2018/6/15	0.193
2018/6/14	0.197
2018/6/13	0.192
2018/6/12	0.191
2018/6/11	0.193
2018/6/8	0.193
2018/6/7	0.193
2018/6/6	0.191
2018/6/5	0.188
2018/6/4	0.191
2018/6/1	0.191
2018/5/31	0.190
2018/5/30	0.191