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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,534,380 | 326,719,196 | 326,719,196 |
| 2006 | $15,273,655 | 390,492,990 | 390,492,990 |
| 2007 | $111,341,464 | 1,555,438,470 | 1,555,438,470 |
| 2008 | $369,025,380 | 2,483,485,661 | 2,483,485,661 |
| 2009 | $147,408,959 | 1,082,772,572 | 1,082,772,572 |
| 2010 | $159,670,926 | 779,764,434 | 779,764,434 |
| 2011 | $382,788 | 2,741,930 | 2,741,930 |
Note: Quantity represents Weight in kilograms
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