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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $546,176,501 | 2,552,496 | 2,552,496 |
| 2006 | $573,976,003 | 2,851,140 | 2,851,140 |
| 2007 | $620,178,540 | 2,924,610 | 2,924,610 |
| 2008 | $764,286,854 | 2,812,280 | 2,812,280 |
| 2009 | $769,188,632 | 2,814,512 | 2,814,512 |
| 2010 | $2,524,827,058 | 3,663,197 | 3,663,197 |
| 2011 | $4,987,239,794 | 3,645,278 | 3,645,278 |
Note: Quantity represents Weight in kilograms
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