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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $218,209,295 | 558,800,000 | 558,800,000 |
| 2006 | $328,847,622 | 654,109,000 | 654,109,000 |
| 2007 | $648,646,647 | 1,042,513,560 | 1,042,513,560 |
| 2008 | $229,747,916 | 297,144,971 | 297,144,971 |
| 2009 | $1,304,874,936 | 2,312,875,356 | 2,312,875,356 |
Note: Quantity represents Weight in kilograms
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