Date	Rate
2012/8/3	0.400
2012/8/1	0.388
2012/7/31	0.389
2012/7/30	0.388
2012/7/27	0.393
2012/7/26	0.388
2012/7/25	0.388
2012/7/24	0.392
2012/7/23	0.389
2012/7/20	0.391
2012/7/19	0.405
2012/7/18	0.424
2012/7/17	0.442
2012/7/16	0.457
2012/7/13	0.480
2012/7/12	0.506
2012/7/11	0.509
2012/7/10	0.506
2012/7/9	0.507
2012/7/6	0.510