| 年月 | 单位：百万美元 |
| 2012-10 | 购买后可见 » |
| 2012-09 | 购买后可见 » |
| 2012-08 | 购买后可见 » |
| 2012-07 | 购买后可见 » |
| 2012-06 | 购买后可见 » |
| 2012-05 | 购买后可见 » |
| 2012-04 | 购买后可见 » |
| 2012-03 | 购买后可见 » |
| 2012-02 | 购买后可见 » |
| 2012-01 | 购买后可见 » |
| 2011-12 | 购买后可见 » |
| 2011-11 | 购买后可见 » |
| 2011-10 | 购买后可见 » |
| 2011-09 | 购买后可见 » |
| 2011-08 | 购买后可见 » |
| 2011-07 | 购买后可见 » |
| 2011-06 | 购买后可见 » |
| 2011-05 | 购买后可见 » |
| 2011-04 | 502.60 |
| 2011-03 | 928.70 |
| 2011-02 | 562.80 |
| 2011-01 | 865.70 |
| 2010-12 | 949.80 |
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