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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,162,449,461 | 439,962 | 439,962 |
| 2006 | $7,832,132,013 | 400,154 | 400,154 |
| 2007 | $9,716,612,392 | 437,620 | 437,620 |
| 2008 | $15,492,546,159 | 561,107 | 561,107 |
| 2009 | $23,172,062,715 | 730,512 | 730,512 |
| 2010 | $37,294,787,057 | 946,759 | 946,759 |
| 2011 | $50,085,490,911 | 1,004,969 | 1,004,969 |
Note: Quantity represents Weight in kilograms
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