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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,307,415,774 | 172,865,175 | 172,865,175 |
| 2006 | $2,698,598,677 | 119,690,322 | 119,690,322 |
| 2007 | $3,033,220,347 | 92,537,550 | 92,537,550 |
| 2008 | $3,501,831,445 | 108,766,204 | 108,766,204 |
| 2009 | $3,491,673,182 | 114,357,881 | 114,357,881 |
| 2010 | $4,170,354,564 | 217,255,791 | 217,255,791 |
| 2011 | $4,891,483,621 | 164,787,746 | 164,787,746 |
Note: Quantity represents Weight in kilograms
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