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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $173,743,000 | 272,391,500 | 272,391,500 |
| 2006 | $166,995,000 | 279,099,300 | 279,099,300 |
| 2007 | $204,306,000 | 272,179,800 | 272,179,800 |
| 2008 | $353,190,000 | 292,164,300 | 292,164,300 |
| 2009 | $195,451,000 | 277,492,000 | 277,492,000 |
| 2010 | $259,929,691 | 265,275,600 | 265,275,600 |
| 2011 | $538,136,613 | 318,138,979 | 318,138,979 |
Note: Quantity represents Weight in kilograms
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