Date	Rate
2010/6/23	0.187
2010/6/22	0.185
2010/6/21	0.183
2010/6/18	0.181
2010/6/17	0.181
2010/6/15	0.180
2010/6/14	0.180
2010/6/11	0.179
2010/6/10	0.178
2010/6/9	0.178
2010/6/8	0.179
2010/6/7	0.178
2010/6/4	0.179
2010/6/3	0.178
2010/6/2	0.178
2010/6/1	0.179
2010/5/31	0.178
2010/5/28	0.178
2010/5/27	0.177
2010/5/26	0.175