| Date | Rate |
|---|---|
| 2011/1/24 | 0.256 |
| 2011/1/21 | 0.260 |
| 2011/1/20 | 0.259 |
| 2011/1/19 | 0.255 |
| 2011/1/18 | 0.254 |
| 2011/1/17 | 0.253 |
| 2011/1/14 | 0.253 |
| 2011/1/13 | 0.254 |
| 2011/1/12 | 0.255 |
| 2011/1/11 | 0.254 |
| 2011/1/10 | 0.254 |
| 2011/1/7 | 0.254 |
| 2011/1/6 | 0.251 |
| 2011/1/5 | 0.252 |
| 2011/1/4 | 0.252 |
| 2011/1/3 | 0.250 |
| 2010/12/31 | 0.250 |
| 2010/12/30 | 0.245 |
| 2010/12/29 | 0.245 |
| 2010/12/28 | 0.243 |
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