Date	Rate
2011/6/20	0.342
2011/6/17	0.343
2011/6/16	0.343
2011/6/15	0.343
2011/6/14	0.342
2011/6/13	0.342
2011/6/10	0.341
2011/6/9	0.342
2011/6/8	0.342
2011/6/7	0.341
2011/6/3	0.342
2011/6/2	0.343
2011/6/1	0.342
2011/5/31	0.332
2011/5/30	0.331
2011/5/27	0.329
2011/5/26	0.325
2011/5/25	0.323
2011/5/24	0.324
2011/5/23	0.322