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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,235,950,341 | 86,353,427 | 86,353,427 |
| 2006 | $28,859,912,995 | 96,131,540 | 96,131,540 |
| 2007 | $32,843,808,873 | 110,936,572 | 110,936,572 |
| 2008 | $35,113,693,688 | 120,460,030 | 120,460,030 |
| 2009 | $36,590,179,847 | 135,392,732 | 135,392,732 |
| 2010 | $39,264,675,983 | 157,635,791 | 157,635,791 |
| 2011 | $37,961,745,859 | 172,377,490 | 172,377,490 |
Note: Quantity represents Weight in kilograms
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