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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $961,748 | 5,391,719 | 5,391,719 |
| 2006 | $2,814,410 | 11,520,395 | 11,520,395 |
| 2007 | $1,115,408 | 4,181,891 | 4,181,891 |
| 2008 | $142,963,221 | 778,977,740 | 778,977,740 |
| 2009 | $272,573,339 | 245,884,469 | 245,884,469 |
| 2010 | $179,863,516 | 35,493,394 | 35,493,394 |
| 2011 | $318,784,159 | 62,686,499 | 62,686,499 |
Note: Quantity represents Weight in kilograms
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