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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,397,466,351 | 3,748,375,243 | 3,748,375,243 |
| 2006 | $1,574,091,486 | 3,419,050,540 | 3,419,050,540 |
| 2007 | $1,159,166,979 | 2,599,408,219 | 2,599,408,219 |
| 2008 | $1,717,270,712 | 2,622,905,493 | 2,622,905,493 |
| 2009 | $1,038,374,832 | 2,432,715,750 | 2,432,715,750 |
| 2010 | $837,418,308 | 1,490,520,433 | 1,490,520,433 |
| 2011 | $1,378,846,994 | 1,845,279,989 | 1,845,279,989 |
Note: Quantity represents Weight in kilograms
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