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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $33,046,828,440 | 93,217,942,039 | 93,217,942,039 |
| 2006 | $56,228,508,837 | 112,602,627,734 | 112,602,627,734 |
| 2008 | $61,005,632,800 | 61,005,632,800 | 61,005,632,800 |
| 2009 | $35,844,021,270 | 80,270,413,830 | 80,270,413,830 |
| 2010 | $44,156,568,500 | 77,959,576,200 | 77,959,576,200 |
| 2011 | $60,913,163,700 | 77,510,385,300 | 77,510,385,300 |
Note: Quantity represents Weight in kilograms
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