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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $545,251,728 | 12,475,222 | 12,475,222 |
| 2006 | $721,840,755 | 18,260,044 | 18,260,044 |
| 2007 | $727,341,823 | 16,755,932 | 16,755,932 |
| 2008 | $453,498,970 | 0 | 0 |
| 2009 | $346,575,514 | 9,893,883 | 9,893,883 |
| 2010 | $601,133,227 | 13,391,380 | 13,391,380 |
| 2011 | $320,823,641 | 15,615,211 | 15,615,211 |
Note: Quantity represents Weight in kilograms
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