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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,107,799,935 | 2,666,384,061 | 2,666,384,061 |
| 2006 | $1,344,154,820 | 2,576,010,994 | 2,576,010,994 |
| 2007 | $1,290,605,463 | 2,137,031,837 | 2,137,031,837 |
| 2008 | $1,648,777,327 | 2,240,239,596 | 2,240,239,596 |
| 2009 | $1,628,792,991 | 3,320,485,236 | 3,320,485,236 |
| 2010 | $1,603,551,806 | 2,562,667,283 | 2,562,667,283 |
| 2011 | $2,312,237,299 | 2,625,411,962 | 2,625,411,962 |
Note: Quantity represents Weight in kilograms
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